• Supports TF card music playback function, and can remember the input mode of the last playback when opening it again
• Press and hold "+" & "-" at the same time to switch the input method between BT card and TF card
• Long press m to turn the device on/off. In call mode, short press to answer an incoming call. In call mode, long press to reject
• Callback In BT mode, double-click to call back the last dialed number. In play mode, short press "Play/Pause"
• You can connect two mobile phones at the same time and switch audio sources

Specification:

• Extension: TF card/auxiliary
• BT Version: 5.1
• Support: MP3/WMA
• Duration: 20h
• Battery capacity: 250mAh
• Display: LED digital display
• Range: 10 meters
• Features: Elastic back clip
• Size: 28x58.6x15mm
• Weight: 16.5g