1. Bluetooth Version: Bluetooth V5.0 2. Working time: 2-3 hours 3. Charging time: 1-1.5 hours 4. Battery capacity: 35 mAh 5. charger: 300 mAh. 6. wireless distance: 8-12 m 7. speaker: high quality copper ring speaker 8. Product Weight: 4-5g (one earphone) 9. Compatible phone: compatible with Android, IOS, Microsoft and so on, 100% of the phone with Bluetooth. Product Features 1. Short play (pause) of music / answer to a call; 2. Dual (right) headphones double short press to reduce (increase) the volume; 3. left (right) headphone presses 3 next (last) music; 4. Siri wakes up easily 5. cancel the open situation and close it to the closed situation; Products include 1 * one pair of Bluetooth headset 1 * charging cable 1 * User Manual