Fashion B20 watch wireless Bluetooth speaker card mini stereo sound small portable and versatile for sport drive running Cycling

Features:
1.this speaker owns excellent sound quality,with perfect audio design.
2.Bluetooth audio transmission and handsfree call.
3.Bluetooth selfie while listening to music
4.FM Radio
5.prompt tone for any work status
6.TF card playing mp3/wav format music
7. inbuilt high-capacity li-ion battery for power supply,long standby time
How to use
1.pls charge over 2 hours before use,the red light will be lit when it is charging.pls make sure it is on when its use,it will enter into bluetooth
2. mode by default when no TF Card inserts into speaker

Specifications:
1.Output power:3W
2.Sensitivity ratio:360mv
3.SNR:80db
4. input power supply:DC5v/500mA
5. Frequency:120HZ-20KHZ
6. Bluetooth version:bluetooth 2.1+EDR