Advantages:
1) Completely wireless, all built-in (like antenna, transmitter, rechargeable li-battery).
2) Exactly same size and color of a normal plastic eraser.
3) High resolution image: (628 X 586pix; 420 TV line)
4) Very smooth video for quick moving image record.( frame rate: 30FPS)
5) Night vision available (0.05lux for the minimum illumination). It will change into black & white image automatically when under dark light.
6) Long continuous operating time is up to 2 hours.
7) Smallest size: 5.7X2.0X1.20CM

Frequency CH1=2414MHz;CH2=2432MHz
CH3=2450MHz
Audio subcarrier frequency. 6.0Mhz;6.5Mhz
Antenna Built-in 2.4G antenna
RF Output power 10mW
Transmitting Range 400 feet in line of sight
Sensor 1/3 CMOS color
Resolution NTSC:510X496;PAL:628 X 586
Horizontal resolution NTSC:420 TV line; PAL:420 TV line
Minimum illumination 0.05lux
Built-in mic. 55dB high sensitivity
View angle 60 degree
Li-battery capacity 220mAh
Continuous operating time 2 hours
Charge time 30 mins
Operating voltage DC 5V
Operating current 110mA
Color white
Size 5.7X2.0X1.20CM