Board Square Dance Speaker 3.7 V Amplifier Support Bluetooth AUX TF-Card U-Disk

Board Square Dance Speaker 3.7 V Amplifier Support Bluetooth AUX TF-Card U-Disk NOTE:(VERY IMPORTANT) 1.It must connect a 3.7V lithium battery to open.---this is very important for power on. 2.Because national delivery regualtion,the battery not included. Features: 1.Support reading MP3 music in U disk and TF small memory card; 2.Built-in Bluetooth receiving function, can receive Bluetooth music from mobile phones; 3.For 3.7V lithium battery, can be charged with DC5V/1-2A charger; 4.With AUX IN external audio input function, can be connected to the computer to play; 5.The panel has a wired jack, which can be used to sing or sing: 6.Using word power amplifier, rated power 15W, peak 30W; 7.Size: 185*85MM 8.The product is mono channel. Package included: 1* 3.7V Bluetooth Amplifier board （Without power） 2* SPeaker Wires 1*Remote Control(Optional)