Product Name: Bluetooth USB Dongles 1) General radio: ĄĄa) Bluetooth class 2, 20m (in open space) ĄĄb) Carrier frequency: 2.4 - 2.483GHz ĄĄc) Data rate: 1Mbps 2) Bluetooth standard: Bluetooth v 1.2 & 1.1 3) Spread spectrum: FHSS (Frequency Hopping Spread Spectrum) 4) Modulation method: GFSK (Gaussian Frequency Shift Keying