Bone Conduction Kit - a set with a vibration generator

Stereo audio level indicator module. Equipped with 32 blue LEDs (16 per channel)

Stereo 2.8W Class D Audio Amplifier - TS2012

4-channel input selector for audio amplifier. Equipped with RCA connectors and controlled by a rotary switch

Bluetooth stereo amplifier module that allows you to play music wirelessly from phones, tablets or computers. It automatically enters pairing mode after the first power supply and then connects to the last paired device, making it easy to use. The set includes 3W speakers with practical JST connectors, and the board is equipped with an integrated LiPo battery charging system, which allows powering from various sources, such as USB-C or battery. Kitronik 2182

LM386 mono digital audio amplifier module. It has a voltage gain of 200 and is powered from 5V to 12V

Zeenko ZK06-BM is a portable, low-noise RF amplifier with battery power, operating in the 10 MHz – 6 GHz band. It offers high gain stability, good overload resistance and full compatibility with spectrum analyzers, including tinySA ULTRA. Particularly recommended for measurement applications and antenna systems.

Audio drive-out indicator module comprising two 12-segment LED displays. Powered by 7 to 12 V

Module of a stereo 24-bit audio converter with I2S interface (TS4657).

The module is based on the Si4703 FM tuner system. Supports wave reception in a wide frequency range from 76 to 108 MHz. It allows you to read RDS information. SparkFun BOB-11083

Microphone preamplifier based on the NE5532 chip. Powered with DC voltage from 9 V to 24 V or AC in the range from 8 V to 16 V

Gravity: Analog Sound Sensor is a sound sensor with Gravity analogue output. The module can be supplied with 3.3 ... 5V voltage. DFRobot DFR0034

Module with a sound sensor based on an electret microphone and LM358 amplifier. The board is equipped with a Grove connector and communicates via an analog interface. Seeed Studio 101020023

Bluetooth 4.2 audio receiver. It allows you to play files via Bluetooth and supports WAV, WMA APE, MP3 and FLAC formats. MH-M18

Audio level indicator module in the form of a kit for self-assembly. Equipped with 32 red and blue LEDs

Audio amplifier with three output channels. It can be powered with the voltage from 5 to 26 V and has two outputs with a power of 50 W (left and right) and one with a power of 100 W (bass). Equipped with Bluetooth 5.0 communication. XY-S100L

Audio amplifier module with three output channels. It can be powered with the voltage from 12 to 18 V and has two outputs with a power of 10 W (left and right) and one with a power of 20 W (bass)