---
product_id: 372189193
title: "Alarm Contact Sensor (2nd Generation) - 2 pack"
price: "¥15218"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/372189193-alarm-contact-sensor-2nd-generation-2-pack
store_origin: JP
region: Japan
---

# Compact 4x5.3x1.4 cm design 76m Z-Wave range to Base Station 2x CR2032 coin cell batteries Alarm Contact Sensor (2nd Generation) - 2 pack

**Price:** ¥15218
**Availability:** ✅ In Stock

## Summary

> 🔐 Elevate your home security game with sleek, smart protection that fits your lifestyle.

## Quick Answers

- **What is this?** Alarm Contact Sensor (2nd Generation) - 2 pack
- **How much does it cost?** ¥15218 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/372189193-alarm-contact-sensor-2nd-generation-2-pack)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Instant Real-Time Alerts:** Get notified the moment a door or window opens—stay one step ahead always.
- • **Space-Savvy Slim Magnets:** Ultra-compact removable magnets fit even the tightest spots for discreet security.
- • **Seamless, Tool-Free Setup:** Install effortlessly on any door or window frame—no tools, no hassle.
- • **Reliable Z-Wave Connectivity:** Robust 76-meter wireless range ensures your security system stays connected throughout your home.
- • **Alexa-Integrated Battery Alerts:** Smart voice notifications when sensor batteries run low—never get caught off guard.

## Overview

The Ring Contact Sensor offers a compact, tool-free installation solution for doors and windows, powered by long-lasting CR2032 batteries. Compatible with 1st and 2nd generation Ring Alarm systems, it delivers real-time Z-Wave notifications and Alexa-enabled battery alerts, ensuring seamless, reliable home security within a 76-meter wireless range.

## Description

Ring Alarm Contact Sensor (2nd Generation) - 2 pack : desertcart.co.uk: DIY & Tools

Review: Perfect Addition to my Ring Alarm System! - This is an excellent product that provides enhanced security for your home. I recently added this product to my existing Ring Alarm System, and I am very satisfied with my purchase. The installation process was straightforward, and the sensors are compatible with my Ring Alarm system. They detect the opening and closing of doors and windows, and the notifications are immediate, giving me peace of mind that my home is always secure. The second-generation sensors are more reliable, efficient, and have a longer battery life than the previous generation. The value for money is great, and the price is reasonable for the quality of the product. In conclusion, if you are looking to enhance your home security, I highly recommend this product. It is a must-have product that complements the Ring Alarm system perfectly, giving you peace of mind knowing that your home is protected.
Review: Easy installation - Easy to install. Long battery life. Does the job as described.

## Features

- Get real-time notifications the moment a door or window opens in your home.
- Now with a more compact design and slim removable magnets for easy installation, even when space is limited.
- Easy, tool-free installation.
- Mounts to doors and window frames.
- 4 x CR2032 Lithium Coin Cell 3V.
- Requires Ring Alarm Base Station. Compatible with 1st and 2nd generation Ring Alarm devices and accessories.
- Alexa can notify you when your Ring Alarm Contact Sensors and Motion Detectors are running low on batteries.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Power | 2 x CR2032 Lithium Coin Cell 3V batteries |
| Operating Conditions | Indoor use, 0°C to 49°C |
| Dimensions | 4 cm x 5.3 cm x 1.4 cm |
| Siren | No |
| Installation | Mount to door or window frame |
| Connectivity | Z-Wave (76m range to Base Station open air, line of sight) |
| Warranty & Service | 1-year limited warranty and service included. If you are a consumer, the limited warranty is in addition to your consumer rights and does not jeopardise these rights in any way. Use of Ring Alarm Kit (2nd Generation) is subject to the terms found here. |
| Support | Click here to view more information on the Ring Alarm Kit (2nd Generation) support page. |

## Images

![Alarm Contact Sensor (2nd Generation) - 2 pack - Image 1](https://m.media-amazon.com/images/I/41Ay3oGTNxL.jpg)

## Questions & Answers

**Q: can these be paired with alexa alone for notifications? do you NEED the alarm or can it just be through alexa?**
A: Hi, no you need the alarm - these sensors only work with the ring alarm system.  You can pair the entire alarm system with Alexa, but none of the additional sensors (door, motion etc) will work without the alarm system.

**Q: I dont have white windows, it would be nice if the contact sensors came in brown as I would the buy then.**
A: They don’t do brown that I am aware off however they do black sensors which are designed to be outside but would work. 

Alternative is to spray them the colour you want

**Q: Does this does the sensor work on a letterboxwork on a letterbox**
A: Yes it should work on a letterbox provided you have surfaces wide enough to stick the sensors to two flat surfaces and keep close together to engange the signal .Once the contact is broken by opening the letterbox the alarm will sound on the control panel if not in disarmed mode.

**Q: Any idea where these are made?**
A: It’s working very good and very sensitive

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect Addition to my Ring Alarm System!
*by P***O on 30 April 2023*

This is an excellent product that provides enhanced security for your home. I recently added this product to my existing Ring Alarm System, and I am very satisfied with my purchase. The installation process was straightforward, and the sensors are compatible with my Ring Alarm system. They detect the opening and closing of doors and windows, and the notifications are immediate, giving me peace of mind that my home is always secure. The second-generation sensors are more reliable, efficient, and have a longer battery life than the previous generation. The value for money is great, and the price is reasonable for the quality of the product. In conclusion, if you are looking to enhance your home security, I highly recommend this product. It is a must-have product that complements the Ring Alarm system perfectly, giving you peace of mind knowing that your home is protected.

### ⭐⭐⭐⭐⭐ Easy installation
*by B***R on 11 December 2025*

Easy to install. Long battery life. Does the job as described.

### ⭐⭐⭐⭐⭐ Simple, Reliable Home Security Addition
*by R***E on 27 December 2024*

I recently added these Ring Alarm Contact Sensors to my existing home security setup, and they've been incredibly straightforward to install. The double-sided tape makes mounting a breeze - no drilling or complicated hardware required. Within minutes, I had the sensors positioned on my doors and windows. Key Pros: Super easy installation Wireless connectivity with good signal range Seamless integration with existing Ring Alarm system Slim, unobtrusive design Important Note: You'll need a Ring Alarm hub to use these sensors, so they're best for people already in the Ring ecosystem or planning to start with their home security system. The sensors are responsive and provide that extra layer of security and peace of mind. Battery life seems solid so far, and the setup process through the Ring app was intuitive. One minor drawback is the requirement of the Ring hub, which adds to the initial cost if you're not already set up. Overall, highly recommended for anyone looking to expand their home security with minimal hassle. Would definitely recommend to friends and family looking for an easy security solution.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/372189193-alarm-contact-sensor-2nd-generation-2-pack](https://www.desertcart.jp/products/372189193-alarm-contact-sensor-2nd-generation-2-pack)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-20*