TPA3116 Bluetooth 5.0 Power Amplifier Board Digital HIFI Module 12-24V Features: Support Bluetooth audio reception With pre-amp, bass frequency processing. With bass, left and right channel volume adjustment,treble adjustment, the master volume potentiometer Using DC 12-24V power supply, maximum output power is: 50W(L)+50W(R)+100W(BASS) Core chip is TPA3116D2 Parameter Size: 101 * 100 * 25mm / 3.98 * 3.94 * 0.98 inch Operating voltage range: DC 11-25V (current 3-4A, or 19-24V/4-5A ,If the power requirements high, above20-24V/8-9A ) Bluetooth receiving distance: >8m(26ft) Speaker impedance:  Left/Right Channel: 4-8Ω  , BASS Channel: 2-8Ω Function Switch Instructions for use： Plug on the power on, the default is Bluetooth mode Bluetooth Disconnected status, Long press the switch can switch to the audio input mode Bluetooth Play status, Short press the switch for Pause/Play Package Included: 1 *  TPA3116D2 Bluetooth 4.2 Digital 2.1 Audio Amplifier Board