Features: 1. Extend the life of the bracelet: use the charging cable with the chip to extend the life of the bracelet 2. Fast Charging: Charging time is full for 2 and a half hours.3. Need to charge on time: Don't wait until the band is completely dead.4. computer USB port better: it is recommended to use the USB interface of the laptop or the USB interface of the computer to charge directly, because their voltage is more stable. Description:For the life of the bracelet battery, it is forbidden to insert the charging head of the mobile phone. Connect the charging cable to your computer or USB notebook after connecting the charging cable. The mouth gets power. Specifications: Size: L 1MMatterial: ABSolor: BlackPackage Included:1*Charger CableNotes:Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee that the style is the same as shown in the pictures. Please allow slight dimension difference due to different manual measurement.