Highlights Bluetooth Scheme: Jieli 7003D4, V5.3 - Experience the latest in Bluetooth technology for a stable and fast connection. Advanced Noise Cancellation - With ANC and ENC, enjoy clear and uninterrupted audio. Long Battery Life - 35mAh earbuds with 300mAh charging case offer up to 7 hours of talk time and 6 hours of playtime. Waterproof and Durable - IPX6 rating ensures protection against water, perfect for active lifestyles. Smart Touch Control - Easily manage your music and calls with intuitive touch controls. Overview Bluetooth scheme: Jieli 7003D4, V5.3 Supported protocols: HSP, HFP, A2DP, AVRCP Battery capacity of earbuds: 35mAh * 2 (without protective plate but protective IC) Battery capacity of charging case: 300mAh (with protective plate) Horn: φ13mm Charging time: 1.5h Talk time: 7h Play time: 6h Standby time: 300h Horn sensitivity: 93 ± 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 the ear Interface: Type-C Waterproof rate: IPX6 (only for earbuds) ENC depth (4 mics for voice call): ＞-40dB