*Audio stereo earphone with built-in mic for hands-free calling
*Speaker: 40mm *Bluetooth version: V4.1+EDR, Chipset: CSR8635
*Support Bluetooth HSP, HFP, A2DP and AVRCP
*RF frequency range: 2.402-2.480GHZ, 2.4G ISM band
*Operating range: 10M (under the condition of no obstacle)
*Talking time: about 10 Hours
*Music playing time: 8 Hours
*Standby time: 250Hours
*Battery: 450mA