... bluetooth wireless mini keyboard, mini keyboard, mini keyboard for tablet pc, bluetooth keyboard mini, laptop mini external ... , usb mini keyboard, mini bluetooth keyboard for smartphone,mini bluetooth keyboard for linux os, mini keyboard mouse combo, ... chipsetRF (radio frequency) specificationReceiving sensitivity: 0-75bm(standardFrequency band: 2.4-2.4835 GHZ unlicensed ISM bandBattery Volumn: ...