ZyXEL ZyWALL OTP (One time Password token) 2 Unit Starter Pack + Server Software CD. Weight: 13 g, Dimensions (WxDxH): 55 x 25 x 12.2 mm. Security algorithms supported: 128-bit AES. Operating relative humidity range: 20 - 95 %, Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): 10 - 50 °C