handsfree wireless bluetooth sunglasses driving smart glasses polarized headset stereo voice control for mobile phone

Description

Specifications: Chip: CSR Bluetooth version: V2.1+EDR Bluetooth model: Hands free / Headset / A2DP / AVRCP Frequency range: 2.402--2.480GHZ Transmission power: Class 2 Power charger: USB DC5V Transmission distance: about 10M Music playing time: 3-4 hrs Talking time: 4hrs Charging time: 1 hrs Weight: 24g Package Content: 1 x K3 Sunglass headset 1 x charging cable 1 x earphone