Bluetooth specification: Bluetooth V5.4 Jerry AC7003, support protocol: Headset Hands-free A2DP Avrcp Transmission range: 10 meters Transmission frequency: 2.4GHz Maximum RF output power (EDR): 4DB, modulation type (EDR): GFSK, π/4-DQPSK Speaker: 13MM, impedance: 32Ω±15% Frequency response: 20~20000Hz Sensitivity: 98db±3db Charging voltage: DC5V, charging time: about 1 hour Charging box battery capacity: 360mah, left and right ear battery capacity 30mAh each Talk time: about 4 hours, music time: about 4 hours Net weight: 57.6g (including charging compartment), bare metal weight: 3.7g (single ear), size: 60.6*45.2*23mm Supports noise reduction and transparency functions, and supports sliding tuning. Smart touch screen functions: language settings, screen wallpaper, headphone search, time settings, camera function (only supports iPhone), flashlight function, music control, volume adjustment, noise reduction transparency mode setting, sound mode setting, alarm clock setting , screen brightness adjustment. The upper part of the screen displays the current battery level of the earphones and charging compartment, and the current accurate time. ]]>
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