Bluetooth 5.0 Power Amplifier Board Stereo Wireless Music Player Module - Blue •The Bluetooth audio signals of mobile phones,laptops,and tablets can be received through this Bluetooth power amplifier board to the stereo amplifier output. The audio interface can also be connected to ordinary headphones with a 3.5mm interface,and ordinary headphones can be turned into Bluetooth headphones (Without microphone,voice chat is not supported). •Using Bluetooth 5.0 main control chip,good transmission effect and high stability •With button control,there are control up and down music,volume increase and decrease,play,pause,switch machine,etc. •Powered by micro 5-pin interface,and the ordinary 5V/2A mobile phone charger and charging cable can be used •Speaker output port*2 sets (one set for each of the left and right channels),and the headphone jack cannot be used at the same time •When the headphone jack is connected to the headphone,the device will automatically switch to the headphone output and stop the signal from the speaker output port of the power amplifier board •Specification: •Product size: 70mm*30mm •Bluetooth version: V5.0 •Product weight: 17g •Power output: 4 ohms 2x5W •Power interface: micro 5-pin (reserved 2.5mm welding port,this model does not support battery power supply) •Input voltage: 3.7V-5V •Power amplifier working mode: can be switched to AB mode •Signal to noise ratio: 90DB •THD+N: -70DB •Crosstalk: -86db •DNR: 91db •Transmission protocol: A2DP/AVCTP/AVDTP/HFP •Transmission distance: about 10 meters (the shorter the distance,the better the stability) •Output interface: 3.5mm stereo (reserved welding point,you can DIY by yourself) •Note: •Users need to use their own USB adapter and micro-USB power cable. Package included: •1 x Bluetooth 5.0 Power Amplifier Board •1 x English and Chinese User Manual