Style:In-Ear Communication:ctors:bluetooth Use:Mobile Function:Waterproof,Noise Canng,Bluetooth Description:ooth EarProduct name:A920BL type:ooth 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