Image sensor 1/4 sony CCD Image resolution 0.68 mega pixels Lamp 6 pcs white LED(5600K) Accumulation point 5mm~50mm Photographing visual angle 700 Frequency 5725~5875MHz Single format NTSC/PAL Message output VGA/S-Video Transmit power 16dB(about 10m) Channel ion 4 channel Receiving sensitivity 95dCrisp, high quality images *Simple operation and installation *Light and easy mobility *Equipped with anti-fog, non-spherical lens *Super-wide automatically adjusting-focus lens *Handpiece holder with automatic power-off function *The computer with USB receiver can receive the image signal several freeze devices in long distance. *With specific remote control and external infrared sensor. *There are display of 4 transmitter channels and multi-function buttons on MD-330. *The up-down pages can be controlled by buttons of handpiece. *With quickly deleted image, re-captured and enlarge function. *Can be stored 240 pcs pictures totally. *It can be changed to each other easily between single or quarter screen. *The captured images can be wireless transmit to database of PC in long distance.