Part Number Description Price List ZKSD420 Basic model, 1/3" Super HAD CCD,650TVL resolution,IP65 waterproof ,,10 X Optical / 10X Digital zoom,SD card USD.965 ZKSD420-W Built - in WiFi,1/3" Super HAD CCD,650TVL resolution,IP65 waterproof ,,10 X Optical / 10X Digital zoom,SD card USD.1000