Hakuba M35 Handheld Slide Viewer Accurate transparency checks with an award-winning handheld 35mm dual-slide viewer Cold cathode tube balances brightness in daylight 2.95 inches wide, 4.0 inches high, 0.6 inches in diameter, and weighs 4.1 ounces Viewing area: 1.5 by 1.5 inches DC 6 volts or 4 AAA batteries (included)