Exclusively at Beyond Digital Print;Acrylic outer protective cover on both sides easily allows for quick replacement of graphics. Light guide plate lines allow for even light distribution Runs on 4 AA Batteries which will last over 3 weeks of being on 24/7. This Amazing little light box is perfect for any low light environment such as Bars, Cafe's, Lounges, Restaurants, Clubs and more!!! ONLY found here!!! Bulk discounts available. Contact us for details, prices vary.Patent Pending