REMAX RB-900HB ANC Noise Canceling Wireless Headset Bluetooth 5.3 Headphones - Black All-inclusive protein leather comfortable to wear Deep noise reduction immerses in pure sound Lightweight headset, 218g, use it not too bulky for you Built-in 400mAh lithium battery, long endurance Bluetooth 5.3 tech, stable connection, HiFi sound quality Specifications: Bluetooth version: 5.3 Transmission distance: 10m Driver unit: 13mm moving coil Frequency Response: 20Hz-20KHz Impedance: 32Ω Battery capacity: 400mAh lithium battery Charging time: about 2 hours Playback time: 50 hours (noise reduction off) and 30 hours (noise reduction on) Weight: 218g Package included: 1 x Wireless Headset 1 x Charging Cable 1 x English and Chinese Manual Other items not included