... 4 Channels Wireless Digital Video Server with SD card. 1.WiFi .(Wifi 802.11.b/g ) 2.Wireless 3G module EVDO/WCDMA/TD-SCDMA 4 Channels CIF Wireless Digital ... .11b/g protocol, 2.4GHZ, maximum wireless distance can be 100 metersHigh-power WiFi: ... b/g/n protocol, 2.4GHZ,maximum wireless distance can be 2 kilometersWireless Encryption Protocol ... )Size 180mm * 50mm * 120mm Wireless 4 Channels IP Video Server