Product name: Smart Bluetooth Glasses Glasses lens: Sunglasses Lenses Bluetooth specification: V4.1+EDR Frequency range : 2.402-2.480GHZ Transmission power: Class 2 Bluetooth mode: headset. A2DP .AVRCP Transmission distance: 10 meters Music Playing earphone time : 4 hours Phone-call earphone time : 5 hours Battery Capacity: 3.7v/110 mah Charge voltage : DV5V/500MA Charging time: 2 hours Earphone power: 32 Ʊ/0.5W Receiving sensitivity: -40 dbm Audio range: 20HZ-20k HZ Distortion degree: less 0.2% 95 db Net weight : 28g Working temperature: -15 ℃-55℃ Storage temperature: -20℃-65℃ |