... Receiver Highlights:Adopt 1/4” Sony 450TV Lines wide-angle button lens, newest technique separate CCD and PCB, lens’back end ... is only 1.5*2*0.5cm,clothes’button size.Small size, light weight, easy operation, emitter build-in ... , layer office, reverse corrupt bureau, court and etc.Specification:Wireless Button CameraImage Sensor1/4" SONY CCDEffective PixelsPAL:628(H)*582(V ...