Metal Pin-hole camera,good design,CMOS or CCD sensor.
handset indoor monitor,
3.5 inch TFT,clear image.
 intercommunication,monitoring the outdoor,unlock..
 Intercommunication is available between indoor and outdoor unit.. 
Brightness, chroma and ring adjustable. 
 3-chord melody rings for option. 
two cameras can connected with four monitors.(different choice)
four wires,DIY installation
Including in one kit:One indoor monitor, one outdoor camera, power adapter, user manual,cables.
Packing detail: Color box,5sets in one carton.
surface mounting for monitor,Flush mounting for camera    
monitor dimension:212(L)x220(W)x55(H)mm 
camera dimension:69(L)x157(W)x23(H)mm 
Wiring requirements:30M: RVV4 x 0.5 mm,50M: RVV4 x 0.75 mm,100M: RVV4 x 1.0 mm

Data of Technology:
Night vision illumination distance; more than 2 meters   
Gain control: Automatic   
Working temperature: -10 C- 50 C
Illumination: 0.1 Lux   
Camera angle: 92 C degrees wide-angle   
voltage: AC100-240V  50Hz-60Hz   
Talk time delay: 90S    
Monitor time delay: 30S    
Dissipation: stand-by <0.5W     working <10W   
Relative humidity: 10 % - 90%(RH)