Bolide 1/3" CCD Color 700 TVL 4-9mm Varifocal Dome Camera with auto switching Day / Night 21 Infrared LED. Vandal Proof Camera 1/3'' 700TVL 1/3" Sony HQ1 CCD color image sensor. NTSC format. Auto switching Day / Night with 21 Infrared LED's with range up to 65ft. Vari-Focal 4-9mm Auto Iris4-9mm lens, manually adjustable for rear or distant viewing. Pan & Tilt 3-Axis adjustment. 0 Lux(IR On). IP66 Vandal proof outdoor housing is designed for extreme condition. If your cameras aren't working when using another brand's DVR, be sure to check the compatibility of your DVR. You may find that it is unable to connect to a wide range of cameras. Some DVRs provided by other companies have a limited range of selection.