Volume adjustment: separate adjustment of master volume, stereo volume and subwoofer volume, wide adjustment range: master volume with buttons: single click: play/pause; double click: next song; triple click: select or cancel box matching mode
Protection mechanism: over temperature, over current, short circuit, anti-static protection
Features: Support Wuzhi Audio app. Modify the bluetooth name, password setting, volume adjustment of prompt tone, on/off prompt tone, sleep aid song, firmware upgrade, etc. box pairing function, the true wireless function enables two sets of speakers to be combined into left and right channel pairing boxes, with a sense of spatial positioning stronger.

Product name: 2.1 channel 15W+15W+30W subwoofer adjustment bluetooth audio power amplifier
Model: ZK-LT22
Power amplifier chip: domestic chip
Bluetooth version: 5.1
Bluetooth transmission distance: 10 meters
Audio input: Bluetooth+AUX+U disk+USB sound card
Audio output: left channel 15W + right channel 15W + subwoofer 30W
Adapter power supply: DC9-24V, ≥3A (can not be connected to AC)
Adapter speakers: left and right channels 10-30W, 4-8Ω; subwoofer 10-30W, 4-8Ω
For Wuzhi Audio APP download link:
(This version of the APP is compatible with new products, please download and update the APP before using the product)
http://www.qingdaowuzhi.cn/btapp/Wuzhi_Audio_V1.0.3.apk
Link to ZK-LT22 product manual: http://www.qingdaowuzhi.cn/ins/lt22/lt22ins.pdf
Product size: 75 x 70 x 20mm
color:Black
Material:PCB+Metal

Package Contents:
1 x 2.1 channel audio power amplifier board
1 x Screwdriver
1 x DC adapter