AI Smart Translate Eyeglasses BT Call Portable Music Play Glasses Rechargeable Wireless Sports Sun Glasses for Men Women. Features: AI Smart Audio Glasses, Lightweight Comfort, IP67 Waterproof, Noise-Cancelling Calls, Customizable Vision. Specification: Origin Mainland China, Operation Instructions, Power on/off, Pairing, Play/Pause, Next/Previous song, Volume up/down, Answer/Hang up call, Reject call, Voice Assistant, Charging, Battery low voltage prompt, Parameters: Chip AB5636, Receiving distance about 10 meters, Working frequency 2.402GHz-2.480GHz, Transmitting power CLASS2 MAX4dbm, Signal-to-noise ratio -85dBV Distortion <1%, Working frequency 20HZ - 20K HZ, Speaker specifications F10MM BOX Speaker impedance 8±15%Ω, Speaker power 0.5W Short-term maximum power 0.7W Charging input voltage DC5±0.25V, Battery specifications 3.8V/90mAh*2, Working voltage 3.7V (3.3-4.2V), Charging time ≤2H, Quiescent current ≤5uA, Microphone sensitivity -42±3DB, Low voltage prompt 3.0V, Continuous music playback time about 7 hours (80% volume), Working current ≤30mA (The higher the volume, the greater the current), Material PC+TAC, Product size about 175.00x150.00x50.00mm/6.89x5.91x1.97inch