**Bluetooth wireless audio transmission,metal sense design;portable, hanging portable design,
**1.Version :V：3.0
**2.Frequency: 2.402-2.480GHz
**3.Max power output :3W
**4.MIC sensitivity: -32db
**5.Distance :10meters
**6.Data transmission :Up to 3Mbps（over the air）
**7.Charging Voltage :3.7V –4.2V DC
**8.Static state Current :>1UA
**9.Built-in 600MAH rechargeable Li-ion battery
**10.Amtenna: Built-in antenna With phone handsfree