Brand Name: BASEUS Active Noise-Cancellation: Yes Aduio playback: about 7hours(70% volume) Battery Capacity 1: 35mAh/0.135Wh(headphones) Battery Capacity 2: 400mAh/1.48Wh(charging case) Battery Capacity[mAh]: 350mAh/0.135Wh Battery life up to[hours]: 30hours Bluetooth Version: 5.3 Category: Earphones & Headphones Certification: CE, RoHS, UL, KC, BQB Charging Method: Charging case Charging Time: about 1hour Codecs: AAC, sbc Color: Black/White Communication: True wireless Connectors: Type c Control Button: No Earcups Type: Sealed Features: Apple Siri Support, Active Noise Cancelling, Dual Connection Frequency Response Range: 20 - 4000 Function: for Video Game, Common Headphone, For Mobile Phone, HiFi Headphone, Sport, For Outdoor, For Office, For Study High-concerned chemical: None Impedance Range: up to 32 Ω Is wireless: Yes Material: ABS, Plastic, ABS+PC Maximum wireless range[m]: