... .connector (Optional Accessories)UHF wireless digital transmission equipment, can link 3G D1 HD video servers, particularly suitable for blind spots ... PTZ serial : 1 channel RS485, support Pan/Tilt/ Zoom( Pelco-D,Pelco-P)Front panel : LED, Keyboard, record, network, Emergency ... modules, plug and play with 3G SIM card, Relay Server will automatically connect according the unique preset DVS name Power ...