1.Description:It is a bluetooth power amplifier board.This Bluetooth version is 4.2,compatible with most mobile phones and Bluetooth adapters,and has a transmission distance of about 15 meters in an open area.It supports automatic connection back to paired devices and automatically plays music.2.Feature:1).It comes with three 2P wires.2).It is a two-channel power amplifier board.3).It has a working indicator,you can see the working status at a glance.4).It comes with a USB charging port for charging lithium batteries,and the USB port can also be used as a power supply or a 5V adapter.3.Parameter:1).Product Name:Bluetooth Power Amplifier Board2).Supply Voltage:DC 3.7V-5V 2A3).Output Power:3W-10W4).Output Impedance:2ohm-8ohm5).Number of Channels:two channels6).Device Name:Bluetooch7).Transmission Distance:15 meters8).Work Temperature:-25℃~85℃9).Work Humidity:5%~95%RH10).Size:40*35*12mm4.Note:1).The charging interface of this product is a current-limiting charging mode without charging management.Please be sure to use a lithium battery with a protective plate.2).Do not use dry batteries,power banks,transformers and other power sources with unstable voltage and current.5.Package:1).1pc Bluetooth Power Amplifier Board2).3pcs 2P Connection Line