ZyXEL P793H. VPN support: - IPSec - PPTP. Dimensions (WxDxH): 178 x 125 x 31 mm, Weight: 0.345 kg. Power requirements: 12 V AC. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 20 - 90 %