N21 Bluetooth headset power display wireless headset with flashlight function Description: 1. and new 2. Second generation Bluetooth 5.2 chip 3. 9D stereo HIFI surround 4. Pull-out charging box design 5. Ergonomic design; will not fall when worn on the ear 6. Life waterproof; no matter whether it is sweat in the gym or outdoor sports in the rain, it will not cause damage to the headphones. 7. The ergonomically designed headphone with soft natural earmuffs will not cause ear pain and other bad conditions even if you wear the headphones for a long.3 Specifications: Bluetooth version: v5.2 Communication distance: 10M ear capacity: 50mah Capacity of charging Cabin: 300mAh Music time: about 35h (with charging cabin) Standby time: about 55h (used with charging cabin) Charging chamber size: 89.9 * 30MM (manual measurement error, for reference only) Earphone size: 22 * 15mm (manual measurement error, for reference only) Applicable products: smart matching mobile phone, tablet computer (Apple Android general) Package content: 1x charging compartment 2x earphones 3x ear caps 1x manual 1x data cable