Vbestlife Bone Conduction - Wireless Headphone

Specification: Bluetooth version: V4.2+EDR, compatible with V4.0, V3.0, V2.1 V1.1 Transmission power: Class 2 Transmission frequency: 2.4GHz Transmission distance: more 10 metres. Battery capacity: 90 mAh. Talk time: approx. 5-6 hours. Playing time: approx. 1-2 hours. Standby time: approx. 100 hours. Supported file formats: for IOS, A2DP, AVRCP, HSP and HFP Product size: approx. 7.3 x 4.5 x 0.7 cm / 2.9 x 1.8 x 0.3 inches. Weight: 31.10 g / 1.1 ounces. Color: Black, Red, Gold, Silver (optional) Package list: 1 x headset. Cable x 1. Manual x 1. Silica gel cover x 1.