HX-MT05 Bluetooth soccer Features: 1.Bluetooth specification:1.2; range:0-10 m 2.DSP technology,full duplex , noise and echo cancellation 3.With high-capacity Lithium battery to provide typical standby time of 240 hours and talking time of 15 hours 4.Voice dialing, last call redialing, and call waiting function. 5.Built-in high intelligent microphone and powerful speaker. plete Bluetooth wireless installation