... over the world 3)Certified by BQB,CE,FCC,KCC 4)Battery with MSDS 2012 hot Mono Bluetooth Headset: Product Feature:The ... within 1 hours.Operating distance: 10m.Range of frequency: 2.4 to 2.4835GHz ISM band.Compatible with: Various Bluetooth enabled ... devices, for example mobile phone, PDA, laptops, etc.Packet content:1 x ...