2 in 1 Smart Sunglasses and Desk Glasses Integrated with STARPHON Bluetooth Headset V5.4 :Wireless Sensitivity: 95±3 dB Operating Range: 10 meters Battery: 55 mAh «2 0 Music and Call Playback Time: 5• hours Standby Time: 200 hours Charging Time: Approximately 1 hour Input: 5V DC, 1A IPX4 Waterproof Lenses: UV400 TAC Frame Material: PC Transmission Power: 6 mW Frequency: 2402-2480 MHz •