Specification : 1)Bluetooth V1.2 Compliant 2)USB UHCI/OHCI spec 2.0 compliant 3)Operation range:100m (Bluetooth class II) 4)Built in antenna 5)LED status indicator 6)Frequency band:2.4GHZ unlicensed 1SM band 7)Maximun data rate:1MB 8)Sensitivity :-89dBM0.1%BER Softwar Support: Windows98/98SE/ME/2000/Xp Attn : Vicky Lee Skype:vickyclear