---
product_id: 386208445
title: "Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421)"
brand: "adafruit"
price: "¥6381"
currency: JPY
in_stock: true
reviews_count: 5
category: "Adafruit"
url: https://www.desertcart.jp/products/386208445-adafruit-i2s-mems-microphone-breakout-sph0645lm4h-3421
store_origin: JP
region: Japan
---

# 50Hz-15KHz frequency range Purely digital I2S output Compact 7.6x5.1x2.5 cm size Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421)

**Brand:** adafruit
**Price:** ¥6381
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your sound game with the tiniest digital mic that hears it all!

## Quick Answers

- **What is this?** Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421) by adafruit
- **How much does it cost?** ¥6381 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/386208445-adafruit-i2s-mems-microphone-breakout-sph0645lm4h-3421)

## Best For

- adafruit enthusiasts

## Why This Product

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

## Key Features

- • **Compact Powerhouse:** Ultra-small 7.6 x 5.1 x 2.5 cm footprint fits seamlessly into sleek, space-conscious designs.
- • **Wide Frequency Range:** Captures rich audio from deep bass (50Hz) to crisp highs (15KHz) for versatile sound detection.
- • **Unmatched Sensitivity:** 94dB audio sensitivity and unidirectional polar pattern pick up subtle sounds even in noisy environments.
- • **Plug & Play Compatibility:** Optimized for Cortex M-series chips and single-board computers—get your project live faster.
- • **Crystal-Clear Digital Audio:** Purely digital I2S output ensures noise-free, high-fidelity sound capture for your next-gen projects.

## Overview

The Adafruit I2S MEMS Microphone Breakout (SPH0645LM4H) is a compact, low-cost digital microphone designed for precise audio detection. Featuring a frequency response of 50Hz to 15KHz and a purely digital I2S output, it delivers clean, noise-resistant sound data optimized for Cortex M-series and single-board computers. Its tiny form factor and high sensitivity make it ideal for innovative audio projects, from sound-reactive lighting to embedded voice detection.

## Description

Listen to this good news - we now have a breakout board for a super tiny I2S MEMS microphone. Just like 'classic' electret microphones, MEMS mics can detect sound and convert it to voltage, but they're way smaller and thinner. This microphone doesn't even have analog out, its purely digital. The I2S is a small, low cost MEMS mic with a range of about 50Hz - 15KHz, good for just about all general audio recording/detection.

Review: Gut
Review: I didn’t test it’s sound QUALITY, but I was amazed by how well it DETECTED sound in my WLED sound reactive project, even with it being placed inside a project box and under a bookcase! I didn’t expect it to really do much and added it as a “because I can” feature for fun but it turns out it’s very reactive and we’ve used it a lot. The gain and squelch settings in WLED allow you to make it as reactive as you’d like and tune out background noise like your furnace The store bought LED controllers that I’ve used (years ago) had to be very close to a speaker to detect anything and light up but NOT THIS! Very impressed and would highly recommend for projects like this.

## Features

- small, low cost MEMS mic with a range of about 50Hz - 15KHz
- there are three digital pins
- The microphone is a single mono element
- This I2S MEMS microphone is bottom ported
- MEMS mics can detect sound and convert it to voltage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XNL2GBW |
| Audio sensitivity | 94 Decibels |
| Best Sellers Rank | #54,260 in Computers ( See Top 100 in Computers ) #755 in Single-Board Computers |
| Colour | Blue |
| Compatible devices | Personal Computer |
| Frequency response | 15 KHz |
| Hardware platform | PC |
| Impedance | 16 Ohms |
| Included components | Microphone |
| Item dimensions L x W x H | 7.6 x 5.1 x 2.5 centimeters |
| Item model number | 3421 |
| Item weight | 5 Grams |
| Manufacturer | Adafruit |
| Material | Plastic, Resin |
| Microphone form factor | Mini |
| Number of batteries | 1 Lithium Ion batteries required. |
| Number of channels | 1 |
| Polar pattern | Unidirectional |
| Power source | Corded Electric |
| Product Dimensions | 7.62 x 5.08 x 2.54 cm; 5 g |
| Signal-to-noise ratio | 15 dB |
| Special features | Purely digital with a digital output, optimized for Cortex M-series chips and single-board computers |
| UPC | 717520031291 604776613404 |

## Product Details

- **Brand:** Adafruit
- **Connectivity technology:** I2S
- **Connector type:** XLR
- **Model name:** Adafruit I2S MEMS Microphone Breakout
- **Recommended uses for product:** Voice Recording, Video Recording, Video Conference

## Images

![Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421) - Image 1](https://m.media-amazon.com/images/I/611Bn5t945L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***Z on 24 October 2025*

Gut

### ⭐⭐⭐⭐⭐ Review
*by S***D on 11 February 2026*

I didn’t test it’s sound QUALITY, but I was amazed by how well it DETECTED sound in my WLED sound reactive project, even with it being placed inside a project box and under a bookcase! I didn’t expect it to really do much and added it as a “because I can” feature for fun but it turns out it’s very reactive and we’ve used it a lot. The gain and squelch settings in WLED allow you to make it as reactive as you’d like and tune out background noise like your furnace The store bought LED controllers that I’ve used (years ago) had to be very close to a speaker to detect anything and light up but NOT THIS! Very impressed and would highly recommend for projects like this.

### ⭐⭐⭐⭐⭐ Review
*by M***L on 26 October 2023*

Kann ich noch nicht sagen da ich es mit wled und dem esp 32 noch nicht zum laufen bekommen habe.

## Frequently Bought Together

- Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421)
- Adafruit Mini Metal Speaker w/Wires - 8 ohm 0.5W [ADA1890]
- ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-28*