Main Features:
4 channels avoid interference                                                         
OSD Menu function                                                                                                                             Build-in speaker                                                                           
Build-in Li-Battery for 5 hours working                                                                                                                                                                                                         
Wireless camera W/build in Battery
Image device: 1/3" color CMOS
TV system: PAL/CCIR NTSC/EIA
Resolution: 380 TV lines                                                     
Supports 4 channels video input on one computer                                          
Built-in IR lights for 3m night vision range                                
Scan frequency: PAL/CCIR, 50Hz; NTSC/EIA: 60Hz
Minimum illumination: 1 Lux/F1.2
Voltage: 8V                                                                   
Output power: 10mW
Frequency range: 2.4GHz