Feature: 1. Use high-quality materials, durable 2. The outer winding shield is made of high-density environmentally-friendly tinned copper wire, which has high density and plays a good shielding role for connecting signals. 3. The Bluetooth name of each product can be changed, and multiple products can be easily identified 4. The volume of prompt tone can be adjusted to meet the different needs of customers 5. Wide application range Parameters: Model: ZK-HT22 Name: 2.1 channel 160Wx2+220W potentiometer external Bluetooth audio power amplifier Power amplifier chip: TDA7498E Bluetooth version: 5.1 Bluetooth transmission distance: 10 meters (if you need a longer distance, please connect an external antenna) Audio input: Bluetooth+AUX+U disk+USB sound card Audio output: left channel 160W+right channel 160W+subwoofer 220W Adaptive power supply: DC1 5-36V, 9A (AC power is not allowed) Adaptive speaker: left and right channels 30 - 200W, 4 - 8 ; Subwoofer 30-200W, 4-8 external lead: 5 7P shielded wires 35cm Potentiometer adjustment: total volume, stereo bass, stereo treble, subwoofer volume, subwoofer frequency Total volume with button Click: Play/Pause Double click: next song Three clicks: select or cancel the box matching mode Protection mechanism: over temperature, over current, short circuit, anti-static protection Featured function: support Wuzhi Audio APP. Modify Bluetooth name, password settings, prompt tone volume adjustment, on/off prompt tone, lullaby, firmware upgrade, etc. The box to box function and the true wireless function enable the two sets of speakers to be combined into left and right channels The box has a stronger sense of spatial positioning. Package included: 1 x Power amplifier board 5 x 7p shielded wire