generation 5.1 chip, simpler and faster connection, 15m transmission distance, more stable signal and faster transmission. U disk playback function, open the U disk playlist, select songs at will, support shake to switch songs. Upgraded large chip, support AAC Bluetooth decoding, more lossless formats, low latency, support APP and TWS. Mono Bluetooth amplifier board 100W. Easily connect your audio system. Model:ZK-1001B Name:Mono 100W Bluetooth audio amplifier board module Amplifier chip:TPA3116D2 Bluetooth version:5.1 Bluetooth transmission distance:15 meters Audio input:Bluetooth + AUX + U disk + USB sound card Audio output:Mono 100W Adaptive power supply:DC7-24V, 24A (not AC) Adaptive speaker:20-100W, 3-8 ohms Volume adjustment:total volume with button Single click: play/pause Double click: next song; triple click: enter or exit TWS mode; long press: power off/on Protection mechanism:input anti-reverse connection, over-temperature, over-current, short circuit, anti-static protection Featured function:support APP. Modify Bluetooth name, password setting, prompt volume adjustment, turn on/off prompt sound, sleep music, firmware upgrade, etc. Pairing function, true wireless function allows two sets of speakers to be combined into left and right channels. Pairing, stronger spatial positioning. Quantity:2Set Colour:Black Material:ABS Package Contents: 2 x Pcd Board 2 x Upper Cover 2 x Lower Cover 2 x Screwdriver 2 x Knob Cap 2 x Radiator 2 x Power Adapter 2 x Copper Pillar Package 2 x Screw Pack