2 Pack ZK-1001U Bluetooth 5.3 Mono Amplifier Board with TWS & Boost Circuit | Mini Audio Amp for Home Outdoor DIY Speakers with 100W Power Output, Treble and Bass, USB/AUX/BT Input, DC 9-24V

This compact Bluetooth audio amplifier board is a mono channel amplifier with a rated power of 100W. It is designed to connect to a passive speaker (20-100W, 3-8) and requires a DC power input of 7-24V with a minimum of 4A (it cannot be connected to AC). It is suitable for use with 7.4V, 12V, or 21V batteries, but is not suitable for 24V batteries. This mono amplifier incorporates a TPA3116D2 chip with a distortion rate below 0.3 %. The upgraded Bluetooth 5.3 chip supports AAC decoding, APP control, and TWS (True Wireless Stereo) functionality for low latency performance.

Outdoor Speaker Amplifier with Boost It features a built-in boost circuit for optimal voltage output. This auto-boosting circuit intelligently adjusts input voltage (9V/15V) to a stable 19V or 24V output (the default is 24V. Setting the red switch to "1" selects 24V, setting it to "ON" selects 19V). This flexible voltage capability makes it ideal for outdoor use with battery-powered speakers. TWS Box Function This set contains 2 units. As a mono amplifier, this power amplifier module supports TWS Box mode. You can connect these two independent Bluetooth power amplifier boards using the TWS box function to achieve left and right channel stereo sound.

Bluetooth 5.3 Inputs The Bluetooth power amplifier board provides 4 types of inputs: AUX, USB flash drive, USB sound card, and Bluetooth wireless connection. The upgraded large chip supports Bluetooth 5.3 for low latency. The wireless connection range for compatible audio devices (such as smartphones, tablets, and laptops) is up to 15 meters (49 feet). HiFi Amp with Treble and Bass Driven by the TPA3116D2 chip, a high-performance Class D power amplifier chip, this device maintains ultra-low distortion across the entire audio frequency band while delivering high-definition sound quality. This mini audio power amplifier features treble and bass controls, allowing you to adjust the sound to suit your musical preferences. Multiple Function Knob This mini amplifier features a single multi-function knob: - Turn the knob clockwise or counterclockwise to adjust the volume level.
- Click: Play/Pause.
- Double click: Next song.
- Three clicks: Enter or exit TWS mode.
- Long press: Turn the device on or off