Security Monitor 21.5 LCD LED 1080P BNC Input Output HDMI VGA Build-in Speakers. 2.5D Comb Filter. 4 in 1 HD Camera. 2.8-12mm Varifocal Dome. 2.8mm Fixed Dome. 3.6mm Fixed Dome. 2.8-12mm Varifocal Bullet. 4CH 4in1 HD DVR. 8CH 4in1 HD DVR. 16CH 4in1 HD DVR. DVR + Security Camera. 8MP TVI/ CVI/AHD, 4K H. 265 ...