Note: This amplifier board is a single-channel design and can only connect to one speaker. It is recommended to use two of these amplifier boards to form a dual-channel output.

Bluetooth Chip: TPA3116D2
Input Modes: Bluetooth + 3.5mm AUX + USB
Audio Output: Mono 100W
Input Voltage: DC 9-24V, >4A
Compatible Speakers: 20-100W,3-8Q
Protection Features: Reverse polarity protection, over-tempe protection, over-current protection, short circuit protection, anti-static protection
Special Feature: TrueWirelessStereo(TWS)
Product Dimensions: 99 × 75 × 22.8 mm
Product Weight:82g; 106g with packaging

100W Mono Amplifier Board：
The ZK-1001U is a 100W mono Bluetooth amplifier board powered by the TPA3116D2 chip, designed for portable audio systems and DIY speaker projects. It supports TWS (True Wireless Stereo), allowing you to wirelessly pair two boards for true left and right channel output. In addition, the ZK-1001U includes treble and bass controls, giving you the flexibility to fine-tune your audio for a richer, more immersive listening experience.

TWS Function - Achieving True Wireless Connection：
1.Turn on two power amplifiers of the same model.

2.Choose either amplifier, then press the master volume knob (with button function) inward three times. The blue TWS indicator will start flashing, and the other amplifier will automatically pair with it to form a stereo setup.(If pairing is not successful within 15 seconds, pairing mode will exit automatically. You can try again by pressing the knob three times.)

3.Once paired, the selected amplifier will function as the left channel, with its blue indicator staying solid. The other amplifier becomes the right channel, and its blue indicator will flash slowly.

4.The next time the units are powered on, they will automatically reconnect. To cancel the pairing, simply press the knob on either amplifier three times.