SG37HCB-3E SG37HCB-4E > Metal Housing > Varifocal Board Camera > 1/3" SONY Super HAD CCD > 540TVL/ 0.2Lux@F1.2 > 12Vdc/ 2.2W > 38(W)x38(H)mm/ 15g > AES/ AGC/ BLC/ FL Switch(ON/OFF)