ViSee Electronic Digital Video Magnifier for TV: Visual/Reading Aide Eight adjustable magnification levels from 1x-32x (based on a 21" screen). Zoom in/out digitally. Image system: NTSC. Video connector: RCA. Four display modes: full color, black type on white, white type on black, high contrast. Bright long lasting LED lights illuminate the reading material for a clearer image. Screen Lock: freeze a text image on screen for easier reading. Oversized, ergonomic mouse for comfortable use, even for those with arthritis. 4 roller wheels for easy and smooth moving on reading material. Simple to use with single clicks for all features and functions. Green 'ON' button lets you know the mouse is switched on. 80-in. (nearly 7-ft. long) Video Output Cable. Compatible with any TV/monitor with RCA input.