... connector (Optional Accessories)UHF wireless digital transmission equipment, can link 3G D1 HD video servers, particularly suitable for blind spots ... : One channel full screen or four channel division screen Local Storage: 8M SD , HDD optionRecord mode: Manual , alarm ,timed ... , support Pan/Tilt/ Zoom( Pelco-D,Pelco-P)Front panel : LED, Keyboard, record, network, Emergency buttonBoard : WCDMA,CDMA 2000, ...