1.one year warranty 2.high quality with compatible price 3.Promptly shippment 4.Paypal accept 5.Good Service SPECIFICATIONS: ModelGS-27USB-50Standard: IEEE 802.11b, IEEE 802.11g (WIFi Compatible)ChipsetRealtek RTL8187L+RTL8225RTL8187B & 8187L both available!Frequency Band:2.412GHz ~ 2.484GHz unlicensed ISM bandData Rate:IEEE 802.11b: 1, 2, 5.5, 11MbpsIEEE 802.11g: 6, 9, 12, 18, 24, 36, 48, ...