Note: SD card function. When you don't have a Bluetooth device around you, you only need one SD card, then insert the SD card into the card slot and you can enjoy the music.You don't need armband and mobile phone when you run, you only need an SD card and this headset to enjoy music. Let you exercise freely.

Key Function:
ON: long press the phone button
OFF: long press the phone button
Volume +: short press +
Volume -: short press -
Up song: long press -
Next song: long press +
Pause playback: short press the phone button
Number redial: Double click in the connected state -
Call answering: short press the phone button
Call rejection: long press the phone button
Hang up the phone: short press the phone button to hang up the call during the call
Call hang up: long press the phone button in the call state

Headphone charging: charging red light, full of blue light

Advantage:
1.TF card function, you don't need to carry a mobile phone to enjoy music when you are exercising.
2.Bluetooth mode and TF card mode, multiple selection
3.Both the battery and the PCBA board are equipped with circuit protection boards to prevent the product from burning during exposure or overuse.
4.Using environmentally friendly materials, no harm to the body
5.Real 80 mAh battery, long standby
6.Magnetic function to avoid ear wire winding and knotting，Easy to carry with soft wire materia
7. 45°chamfer design at the ear for better wear，light and comfortable

Package content:
Bluetooth headphone
USB charge cable
Manual book
A pair of ear hooks
3 pairs of ears (large, medium and small)