Style:In-Ear Communication:Wireless Connectors:bluetooth Use:Mobile Phone Function:Waterproof,Noise Cancelling,Bluetooth Description:Wireless Bluetooth Earphone Product name:A920BL type:wireless bluetooth version:CSR4.1 profile support:HSP/HFP/A2DP/AVRCP Standby time:200H charging time:1h Frequency range:2.402G-2.480G Ambient temperature:-20/60C Transmission distance:10m Show More