Vjoypro Ubit B20 Smart Watch with Self-Timer Anti-Lost Alarm Music Sport Mini Bluetooth Speaker Support TF Card FM Radio Hands-Free for Android iOS Smartphone (Black) Overview: 1. Wireless connection, Bluetooth transmission, completely out of the line of bondage. 2. Has powerful play function like TF card, computer speaker. 3. Stereo, fully feeling of listen, bass sound is excellent. 4. Fashion, perfect match with mobile. 5. Save the power when the device is playing. 6. Selfie Remote Control Shutter. 7. Cellphone Anti-lost. 8. FM Radio Player 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 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