T77 Bluetooth Earbuds with Microphone - Wireless Earbuds with Rotating Charging Case, 4 Mics with Noise Cancelling, White

4 ENC mics Rotating charging case (mechanical feel with decompression) Horn diameter: 13mm with surging bass Bluetooth chip: JL6973D4 Bluetooth version: 5.3 Supported protocols: A2DP, HFP, AVRCP Battery capacity of earbuds: 30mAh*2 (without protection board but protection IC) Battery capacity of charging case : 250mAh (with protection board) Diameter of horn: 13mm Charging time: 1.5h Talk time: 5h Play time: 4h Standby duration: 300h Horn sensitivity: 116±3DB Horn impedance: 32Ω Standard input voltage: DC 5V Bluetooth working frequency: 2.402GHz~2.480GHz Frequency response range: 20Hz~20,000Hz Maximum transmission distance: 10m Voice prompt: supported Multi-point connection: unsupported Wearing method: In-ear User manual: Chinese and English Interface: Type-C Waterproof rate: IPX5 ENC depth of 4 mics: ＞-40dB Included Accessories: USB charging cable, manual ENC &Hifi Bass Call Noise Canceling I 13MM Large Drive Unites