Celestron LED Handheld Illuminated Magnifier-2x with Clamshell Digital Compass with headings and degrees, Altitude in both feet and meters Temperature (F or C), Current Time, Calendar showing day, month and year, Alarm, Bubble Level Backlight LED for use in low light conditions, Lanyard, Batteries Included, Water Resistant Weather Forecast using icons. Barometer shows barometric air pressure and sea pressure 2x Power, 4.25" (108 mm) Diameter, Inset Lens of 4x Power with 1" (25 mm) Diameter LED Illumination Uses three LR1130 (provided standard) Weight - 4.2 oz (119g) High Quality Acrylic Lens.