*material: Import PC + ABS plastic alloy structure Rugged,Shockproof Dustproof*Size: 47*40*11mm*Bluetooth Version: Bluetooth V3.0+EDR*Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.2*Range of Frequency: 2.4GHz spectrum*Ambient Noise: ?75d*BTransmitting Range: ?10m*Charging Time: about 1 hour...