---
product_id: 345451826
title: "Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421)"
brand: "adafruit"
price: "€ 36.30"
currency: EUR
in_stock: true
reviews_count: 5
category: "Adafruit"
url: https://www.desertcart.fi/products/345451826-adafruit-i2s-mems-microphone-breakout-sph0645lm4h-3421
store_origin: FI
region: Finland
---

# Wide 50Hz-15kHz frequency range Ultra-compact 0.66x0.5x0.07 in Pure digital I2S output Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421)

**Brand:** adafruit
**Price:** € 36.30
**Availability:** ✅ In Stock

## Summary

> 🎤 Tiny Mic, Big Impact: Hear the Future Now!

## Quick Answers

- **What is this?** Adafruit I2S MEMS Microphone Breakout - SPH0645LM4H (3421) by adafruit
- **How much does it cost?** € 36.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/345451826-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

- • **Miniature Powerhouse:** At just 5 grams and ultra-thin, it fits effortlessly into sleek, space-conscious projects.
- • **Broad Frequency Response:** Captures rich audio detail from deep bass to crisp highs (50Hz-15kHz) for versatile sound detection.
- • **Plug-and-Play Innovation:** Low-cost MEMS tech with I2S interface accelerates your prototyping and production cycles.
- • **Noise-Resistant Sensitivity:** 94dB sensitivity with adjustable gain lets you tune out background noise and focus on what matters.
- • **Seamless Digital Audio Capture:** No analog conversion means cleaner, hassle-free integration with modern microcontrollers and DSPs.

## Overview

The Adafruit I2S MEMS Microphone Breakout (SPH0645LM4H) is a compact, purely digital microphone module designed for professional audio detection and recording. Featuring a wide frequency response of 50Hz to 15kHz and high sensitivity at 94dB, it delivers clean digital audio output via I2S without analog conversion. Its ultra-thin form factor (0.66 x 0.5 x 0.07 inches) and lightweight design (5g) make it ideal for embedded projects requiring precise sound detection with minimal footprint.

## 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

- Smaller and thinner than 'classic' electret microphones
- Low cost MEMS mic with a range of about 50Hz - 15KHz
- Good for just about all general audio recording/detection
- Purely digital, No analog conversion required!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XNL2GBW |
| Audio sensitivity | 94 Decibels |
| Batteries | 1 Lithium Ion batteries required. |
| Best Sellers Rank | 24,769 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 537 in RCA Cables |
| Colour Screen | No |
| Customer Reviews | 4.6 4.6 out of 5 stars (59) |
| Date First Available | 18 Jan. 2017 |
| Frequency response | 15 KHz |
| Hardware platform | PC |
| Impedance | 16 Ohms |
| Item Weight | 5 g |
| Item dimensions L x W x H | 7.6 x 5.1 x 2.5 centimetres |
| Item model number | 3421 |
| Item weight | 5 Grams |
| Manufacturer | Adafruit |
| Material | Plastic, Resin |
| Material Type | Plastic, Resin |
| Microphone form factor | Mini |
| Number of batteries | 1 Lithium Ion batteries required. |
| Number of channels | 1 |
| Power source | Corded Electric |
| Product Dimensions | 7.62 x 5.08 x 2.54 cm; 5 g |
| Signal-to-noise ratio | 15 dB |
| Size | 0.66 x 0.5 x 0.07 inches |
| UPC | 717520031291 604776613404 |

## Product Details

- **Brand:** Adafruit
- **Colour:** Blue
- **Compatible devices:** Personal Computer
- **Connectivity technology:** XLR
- **Connector type:** XLR
- **Included components:** Microphone
- **Model name:** Adafruit I2S MEMS Microphone Breakout
- **Polar pattern:** Unidirectional
- **Recommended uses for product:** Voice Recording, Video Recording, Video Conference
- **Special feature:** Purely digital with a digital output, optimized for Cortex M-series chips and single-board computers

## 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 Finland*
*Store origin: FI*
*Last updated: 2026-02-28*