1. Bluetooth headphones support two devices connected simultaneously and allow automatically reconnecting if paired successfully before. The headphones are widely compatible with most cell phones, such for IOS and Android phones, and also plenty of other Bluetooth devices.
2. Upgraded built-in lithium batteries support up to 7 hours talk / music time depends on volume and audio content for prolonging enjoyment. Only charge for 1-2 hours can get full energy back. The surprisingly ultra light design at only 14g net weight barely makes you feel anything during workout.
3. Both earpieces are with built-in magnets which can attach to each other like a necklace around your neck when not in use. This elegant design helps earphones storage and keeps you away from getting entangled with the wire. You'll find it most convenient to carry the earphones around for any outdoor activities, such as hiking, cycling, sports, exercise, and more.
4. With TF card slot which you can use TF card when you cannot use Bluetooth .
5. With in-line microphone and volume buttons, the headphones enable you to make hands-free calls and manage music easily and instantly.

Tips: When charging with a charging adapter, please make sure the current should not be greater than 1A.

Bluetooth Version: Bluetooth 4.2
Power Input: DC 5V / 90mA
Working Time: Up to 7 hours
Charging Time: 1-2 hours