... ) up to 4bm, low radiation Modulation: 2.4G Direct Sequence Frequency Hopping (FHSS) Transmit power: Class 2 level Built-in lithium battery, full ... headset, bluetoothcarkit, bluetooth speaker, bluetooth mouse, Bluetooth dongles,Pager, pager system, 3G wireless modemcell phones, Bluetooth keyboard for ipad and iphone 4, etc ...