---
product_id: 386208445
title: "I2S MEMS Microphone Breakout - SPH0645LM4H (3421)"
brand: "adafruit"
price: "£18.26"
currency: GBP
in_stock: true
category: "Adafruit"
url: https://www.desertcart.co.uk/products/386208445-i2s-mems-microphone-breakout-sph0645lm4h-3421
store_origin: GB
region: United Kingdom
---

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

**Brand:** adafruit
**Price:** £18.26
**Availability:** ✅ In Stock

## Summary

> 🎧 Tiny Mic, Big Impact: Hear Every Detail, Own Every Moment

## Quick Answers

- **What is this?** I2S MEMS Microphone Breakout - SPH0645LM4H (3421) by adafruit
- **How much does it cost?** £18.26 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/386208445-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

- • **Ultra-Compact Design:** Fits seamlessly into any project with a tiny 7.6 x 5.1 x 2.5 cm footprint and featherlight 5g weight—perfect for sleek, modern setups.
- • **Wide Frequency Range:** Captures rich audio detail from 50Hz to 15KHz, covering everything from deep bass to crisp highs for versatile sound detection.
- • **Unmatched Sensitivity:** 94dB audio sensitivity and unidirectional polar pattern ensure your device hears what matters, even in noisy environments.
- • **Plug & Play Compatibility:** Optimized for Cortex M-series chips and single-board computers, making integration effortless for your next innovative build.
- • **Crystal-Clear Digital Audio:** Experience pristine sound capture with a purely digital I2S output, eliminating analog noise for flawless recordings.

## Overview

The Adafruit I2S MEMS Microphone Breakout (SPH0645LM4H) is a compact, low-cost digital microphone designed for precise audio capture. Featuring a frequency response of 50Hz to 15KHz and a purely digital I2S output, it delivers clean sound data optimized for Cortex M-series and single-board computers. Its ultra-small form factor and high sensitivity make it ideal for innovative audio projects, sound-reactive devices, and professional-grade recordings.

## 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.

## 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 |
| Antenna Location | Voice Recording, Video Recording, Video Conference |
| Audible Noise | 15 Decibels |
| Audio Sensitivity | 94 Decibels |
| Best Sellers Rank | #35,464 in Computers ( See Top 100 in Computers ) #543 in Single-Board Computers |
| Brand | Adafruit |
| Built-In Media | Microphone |
| Color | Blue |
| Compatible Devices | Personal Computer |
| Connectivity Technology | I2S |
| Connector Type | XLR |
| Customer Reviews | 4.6 4.6 out of 5 stars (65) |
| Enclosure Material | Plastic, Resin |
| Frequency Range | 50 hz 15 khz |
| Frequency Response | 15 KHz |
| Hardware Platform | PC |
| Impedance | 16 Ohms |
| Item Dimensions | 7.6 x 5.1 x 2.5 centimeters |
| Item Weight | 5 Grams |
| Manufacturer | Adafruit |
| Maximum Frequency | 15 KHz |
| Mfr Part Number | 3421 |
| Microphone Form Factor | Mini |
| Model Name | Adafruit I2S MEMS Microphone Breakout |
| Model Number | 3421 |
| Number of Batteries | 1 Lithium Ion batteries required. |
| Number of Channels | 1 |
| Polar Pattern | Unidirectional |
| Power Source | Corded Electric |
| Signal-to-Noise Ratio | 15 dB |
| Special Feature | 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

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

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**Shop now:** [https://www.desertcart.co.uk/products/386208445-i2s-mems-microphone-breakout-sph0645lm4h-3421](https://www.desertcart.co.uk/products/386208445-i2s-mems-microphone-breakout-sph0645lm4h-3421)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-10*