---
product_id: 107179234
title: "eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380"
brand: "eufy security"
price: "¥8845"
currency: JPY
in_stock: true
reviews_count: 13
category: "Eufy Security"
url: https://www.desertcart.jp/products/107179234-eufy-security-entry-sensor-detects-opened-and-closed-doors-windows
store_origin: JP
region: Japan
---

# Instant smartphone notifications 2-year battery life 100-decibel siren alert eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380

**Brand:** eufy security
**Price:** ¥8845
**Availability:** ✅ In Stock

## Summary

> 🔐 Stay one step ahead with silent style and loud security!

## Quick Answers

- **What is this?** eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380 by eufy security
- **How much does it cost?** ¥8845 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/107179234-eufy-security-entry-sensor-detects-opened-and-closed-doors-windows)

## Best For

- eufy security enthusiasts

## Why This Product

- Trusted eufy security brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless 2-Year Power:** Say goodbye to frequent battery swaps with a robust 800-day battery life that keeps your home secure nonstop.
- • **Instant Intrusion Alerts:** Get real-time push notifications straight to your phone the moment a door or window is opened beyond 1.5 inches.
- • **Plug & Play Installation:** No tools, no hassle—just peel, stick, or screw and sync with your eufy HomeBase for immediate peace of mind.
- • **Sleek, Invisible Protection:** Compact, minimalist design fits discreetly on any door or window frame—security that blends seamlessly with your space.
- • **Siren That Commands Attention:** Trigger a piercing 100-decibel siren on your HomeBase to deter intruders and alert everyone nearby.

## Overview

The eufy Security Entry Sensor is a compact indoor device that monitors doors and windows, sending instant alerts to your smartphone and triggering a 100-decibel siren on the HomeBase when unauthorized entry is detected. With an impressive 2-year battery life and easy peel-and-stick installation, it seamlessly integrates into your eufy Security ecosystem for reliable, hassle-free home protection.

## Description

Entry Sensor Protect Your Doors and Windows from Break-Ins with eufy Security Entry Sensor. Once a window or door is ajar by 1.5 inch, an alert will be sent to your smartphone, and a 100-decibel siren will go off on the HomeBase (can be disabled). eufy Security: Less Trouble. More Secure. Ever Expandable. Surveil your home from front to back for total peace of mind Created by the same team as Anker—renowned for exceptional quality and innovation FAQ Is there any battery included in package? Yes, a CR123A Battery is included. Can I use my own router to pair with eufy Security Entry Sensor? No, you can only use eufy Security HomeBase to pair with eufy Security Entry Sensor. Can I use it in outdoor environment? No, it is designed for indoor use only (Not Weatherproof). How can I know if I need to change the battery? There's low battery life notification, which will inform you when the battery level is lower than 10%. How to install the entry sensor? Step 1: Peel off the mounting tape and stick or screw the sensor onto the door or window you want to monitor. Step 2: Stick the magnet part onto the frame of this door or window near the entry sensor's printed ''Magnet'' wording. Note: Please make sure the distance between entry sensor and the magnet is shorter than 1.5in.

Review: Easy, Simple, Efficient. - Easy to install and set up. I already have the homebase 3 and numerous other eufy devices. Very small and placed in the top corner of the door and isn't noticeable unless you know it's there. You can change all the settings via the eufy app which I find it very user friendly and the forums are brilliant if you get stuck!
Review: Easy to install and works reliably within the EUFY security app on an Android handset. - I have already purchased one of these and was apprehensive the first time that I had to install and configure it on a Homebase 2 Hub...but it was simple and has worked reliably ever since, even after I upgraded to a S380 Homebase 3 Hub. I have now bought another sensor to use within the same installation and it installed even quicker using the EUFY security app on an Android handset and is simple to label and to select a sound, if required. Now I intend to forget about it because it works without fault and battery seems to last forever. To be honest...an excellent item, reasonably priced, well constructed and RELIABLE. Not often that I can say that about technology. Buy with confidence. Arrived next day too with Prime. Many thanks EUFY. (FYI...ensure that Homebase and ethernet hub are located in a ventilated area and cannot overheat as this will cause problems with remote access to storage. It says it in the instructions too. Thought I'd mention it...always learning.)

## Features

- 2-year Battery Life: One battery provides 800 days of monitoring.
- For Doors And Windows: Compact and versatile design fits onto any door or window frame. Requires eufy Security HomeBase.
- 100-Decibel Siren: Enable or disable siren protection, which triggers a 100-decibel siren on HomeBase, and sends an alert* to your smartphone when forced entry is detected.*Push notifications with thumbnail previews require thumbnail preview images to be temporarily stored in the cloud.
- Easy Installation: Just peel off the mounting tape and stick or screw the sensor onto the door or window you want to monitor.
- What’s Included: Entry Sensor, CR123A Battery, Magnet, 3 x Mounting Screws, Owner's Manual.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JJD6CFV |
| Batteries | 1 AAA batteries required. (included) |
| Battery description | Lithium |
| Best Sellers Rank | 11,414 in DIY & Tools ( See Top 100 in DIY & Tools ) 11 in Home Security Door & Window Sensors |
| Control method | App |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,717) |
| Date First Available | 18 Oct. 2018 |
| Item Weight | 68 g |
| Item model number | AK-T89003D3 |
| Item weight | 68 g |
| Manufacturer | Anker |
| Mounting type | Door Mount |
| Noise level | 100 Decibels |
| Number of batteries | 1 AAA batteries required. (included) |
| Other display features | Wireless |
| Product Dimensions | 7.4 x 2.8 x 2.2 cm; 68.04 g |
| Sensor technology | Contact Sensor |
| Size | Entry sensor |
| UPC | 848061046427 |
| What’s in the box | Entry Sensor |

## Product Details

- **Brand:** eufy Security
- **Colour:** White
- **Compatible devices:** Smartphone
- **Power source:** Battery Powered
- **Product dimensions:** 7.4L x 2.8W x 2.2H centimetres

## Images

![eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380 - Image 1](https://m.media-amazon.com/images/I/5161rwtCsHL.jpg)

## Questions & Answers

**Q: Does this sensor work with the Homebase 2 that comes with the eufycam 2?**
A: Yes, it works with the Homebase 2.

**Q: Can this be used in an alexa routine as a trigger? E.g. door opens then Alexa announces and turns on a light.**
A: No I can’t seem to get this working using. I can create a routine in Alexa and manually run it, but the trigger from the sensor doesn’t fire it. Googling seems to be missing functionality in their product. Gutted.

**Q: Can the sensor be turned off completely? I mean there are any buttons on the sensor itself to turn it completely off?**
A: No, there are no buttons on the sensor to turn it off. You can take the battery out if you want to disable it.... but the idea is to set the on/off condition using the app. Different alert modes can have different on/off settings.

**Q: I used to get instant notification if it was open.  It now only gives me a notification after a set time?  Can I have an instant notification?**
A: The developers seem to mess with the app a lot. I used to get notifications when my door sensors opened and closed. Now I only get them when the door opens. Sometimes it nevers registers as having closed. Very annoying.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy, Simple, Efficient.
*by A***R on 29 September 2025*

Easy to install and set up. I already have the homebase 3 and numerous other eufy devices. Very small and placed in the top corner of the door and isn't noticeable unless you know it's there. You can change all the settings via the eufy app which I find it very user friendly and the forums are brilliant if you get stuck!

### ⭐⭐⭐⭐⭐ Easy to install and works reliably within the EUFY security app on an Android handset.
*by M***W on 21 February 2023*

I have already purchased one of these and was apprehensive the first time that I had to install and configure it on a Homebase 2 Hub...but it was simple and has worked reliably ever since, even after I upgraded to a S380 Homebase 3 Hub. I have now bought another sensor to use within the same installation and it installed even quicker using the EUFY security app on an Android handset and is simple to label and to select a sound, if required. Now I intend to forget about it because it works without fault and battery seems to last forever. To be honest...an excellent item, reasonably priced, well constructed and RELIABLE. Not often that I can say that about technology. Buy with confidence. Arrived next day too with Prime. Many thanks EUFY. (FYI...ensure that Homebase and ethernet hub are located in a ventilated area and cannot overheat as this will cause problems with remote access to storage. It says it in the instructions too. Thought I'd mention it...always learning.)

### ⭐⭐⭐⭐⭐ Great security devices for your flat
*by L***N on 29 January 2023*

After considering all alternatives, I decided to get this Eufy camera set+home base and I am really satisfied. The cameras give a good image quality on your mobile, and you can always connect and check the live feed. It has night vision too, which makes it possible to get a clear video in any situation. Its face recognition system makes it so the alarm only goes off if a human is seen, so you won't get an alert if anything irrelevant happens. You can still get a notification for a movement detected, so you can check in any case. Everything is controlled via the app, you can make your custom schedule so the alarm is on when you go to work and automatically turns off when you get back. Battery life for the wireless cameras is extremely good, I think in a year I only charged them once, and they were still about at half charge anyway. Set up is very easy, and takes a matter of minutes.

## Frequently Bought Together

- eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380
- eufy Security Home Alarm System Motion Sensor, 100° Coverage, 30 ft Detection Range, 2-Year Battery Life, Adjustable Sensitivity (HomeBase Required)
- eufy Security Siren, 105 dB Wireless Alarm, IP65 Weatherproof, Remote Alerts, 2-Year Battery Life, HomeBase Required, Compatible with HomeBase S380 and S280, App Control, Easy to Install

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-24*