Main Features:
Wider view angle: 54 degree lens
2.4 inches LCD screen, LCD resolution: 320 x 320
Using the digital camera chip, 300000 pixels, much clearer image
Lower power consumption: 2 x AA batteries ( not included ) support 1700 peeps and no standby power loss
15Sec automatic shutdown, users need not worry about battery runs out quickly if forgetting shutdown.
Easy operation: Just press the button ( image displayed immediately, video automatic switched off in 15 seconds ), so convenient for children and the elderly. 
No shadow can be seen from outside, so as to protect privacy of the house owners. User also can see outside by screen to improve the safety.
Quick start: Just push the  button, without waiting, image displayed immediately. 
Convenient installation, no lines. Very easy to install in place of the "peep" hole in your door
Assembly: Takes 1 person approx. 5 minutes using a screwdriver and the included tool
Door thickness: Barrel will fit doors that are 35 - 57mm wide

Sensor: CMOS

Package weight: 0.251 kg
Product Size(L x W x H): 13.50 x 9.00 x 3.50 cm / 5.31 x 3.54 x 1.38 inches
Package Size(L x W x H): 16.50 x 9.50 x 4.00 cm / 6.5 x 3.74 x 1.57 inches
Package Contents: 1 x Hidden Outdoor Camera, 1 x Indoor Unit, 1 x Mounting, 1 x Screw