Work: Class D 
Quiescent Current: 50mA 
Efficiency: 90% 
Rated output power: 2 * 50W + 100W 
Frequency response: 20Hz to 20KHz 
Operating voltage: DC18V to DC24V 
Maximum output current: 4A 
PCB size: 160 * 108MM 
Potentiometer function: from left to right around 2 channel 1 bass treble volume around 3 channel volume 
Potentiometer distance: from left to right for 28.8MM 2-3 1-2 to 30MM 
bluetooth features:

 

• Wideband speech supported by HFP v1.6 profile and mSBC codec

• 80MHz RISC MCU and 80MIPS Kalimba DSP

• Internal ROM, serial flash memory and EEPROM Interfaces

• High performance Mono CODEC

• SBC, MP3 and AAC decoder support

• Multipoint A2DP support enables connection to 2 A2DP source devices for music playback

• Stereo Line-in

• Integrated dual switch-mode regulators, linear regulators and battery charger

• bluetooth reception range MAX 15 meters in blank space