This Portable Colour Video Magnifier has a 3.5" screen making it ideal to carry wherever you go. It features 6 text/background colour modes, four levels of magnification, up to x10, adjustable brightness and a low battery indicator. It can be used independently or connected to a TV or computer via a USB converter which is available separately. This unit is powered by a rechargeable battery which is included. Also included is a carry case, charger, video cable, lens cleaning cloth and an attachable strap for ease of carrying.