Digital Amplifier Board Digital 14×12×5 Power Amplifier Board for Digital Volume Potentiometer Module 2.1 Channel Digital Amplifier Board 2.1 channels amplifier board using high quality materials, strong and , has service life. input method: for. number of channels: 2.1 channels, 68-bluetooth amplifier box amp btx-pwr amp btx01 mechanism safety with overvoltage, undervoltage, overheating, dc detection, and short circuit. quality this amplifier board is manufactured under strict quality control and standard requirements, and has high safety factor, so it be used with confidence., p b0bfw8hslb 1. With AUX + for Bluetooth audio input, subwoofer + left and right channel output 2. The power amplifier chip has AM interference suppression function 3. The mechanism includes overvoltage, undervoltage, overheating, DC detection, and short circuit , which is relatively 4. Using high?quality materials, strong and , has a long service life 5. With small size, easy to carry and store, convenient to use and with good performance Spec: Item Type: Power Amplifier Board Product Model: ZK-TB21 for Bluetooth Version: 5.0 (Unobstructed: Approx. 10meter / 32.8ft) Input Sensitivity: 500mV Input Method: AUX+ for Bluetooth Number of Channels: 2.1 channels Power Amplifier Chip: TPA3116D2 (with AM interference suppression function) Adapter Power Supply: DC 12-24 V/5A or more (the higher the voltage, the greater the output power) Adapted Speakers: 20-100W, 4-8? Output Power: Left and right channels Subwoofer Mechanism: Overvoltage, undervoltage, overheating, DC detection, short circuit Package List: 1 x Power Amplifier Chip 2 x Power Amplifier Board Module 1 x Screw Accessories Pack 1 x Screwdriver Accessories Pack