---
product_id: 386208445
title: "I2S MEMS Microphone Breakout - SPH0645LM4H (3421)"
brand: "adafruit"
price: "C$2607"
currency: NIO
in_stock: true
reviews_count: 4
category: "Adafruit"
url: https://www.desertcart.ni/products/386208445-i2s-mems-microphone-breakout-sph0645lm4h-3421
store_origin: NI
region: Nicaragua
---

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

**Brand:** adafruit
**Price:** C$2607
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with the tiniest powerhouse on the block!

## Quick Answers

- **What is this?** I2S MEMS Microphone Breakout - SPH0645LM4H (3421) by adafruit
- **How much does it cost?** C$2607 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/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 sleek, bottom-ported MEMS microphone just 5 grams light—perfect for space-conscious pros.
- • **Broad Frequency Range:** Captures rich audio detail from deep 50Hz bass to crisp 15KHz highs, ideal for versatile sound detection and recording.
- • **Unidirectional Precision:** Focuses on sound from one direction to reduce background noise, delivering clear and focused audio input every time.
- • **Crystal-Clear Digital Audio:** Experience pristine sound capture with a purely digital I2S output, eliminating analog noise for flawless recordings.
- • **Plug-and-Play Compatibility:** Optimized for Cortex M-series chips and single-board computers, ensuring effortless integration and rapid deployment.

## Overview

The Adafruit I2S MEMS Microphone Breakout (SPH0645LM4H) is a compact, low-cost digital microphone designed for professional-grade audio capture. Featuring a frequency response of 50Hz to 15KHz and a purely digital I2S output, it offers noise-free sound detection optimized for Cortex M-series and single-board computers. Its ultra-lightweight, bottom-ported design makes it ideal for seamless integration into modern audio projects and smart devices.

## 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: This worked right out of the box. I have this working in Home Assistant via EspHome. Reach out to me if you have questions or need consultation in that application.
Review: Gut

## 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 | #41,937 in Computers ( See Top 100 in Computers ) #485 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

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***L on 2 September 2024*

This worked right out of the box. I have this working in Home Assistant via EspHome. Reach out to me if you have questions or need consultation in that application.

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

Gut

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

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-01-24*