Item Type: Multifunctional Electronic Dial Material: ABS Function: Weather Forecast, Altimeter, Compass, Barometer, Clock, Level, Perpetual Calendar Battery Type: 2 x AAA Batteries (Not Included) Package List 1 x Electronic Dial 1 x Instruction Book 1PROFESSIONAL DESIGN: Digital barometer altimeter is based on direction sensing and barometric pressure sensing electronics and is designed for outdoor use. 2MULTIFUNCTION: Digital altimeter compass features a full screen digital display of bearing, direction, clock, temperature, weather forecast and altitude. 3BLUE BACKLIGHT: Barometer altimeter compass with blue backlighting provides a clear view of the readings on the LCD display regardless of the environment. 4IDEAL EQUIPMENT: Digital LCD altimeter is the ideal easy to use piece of equipment for outdoor enthusiasts, providing them with extensive and essential environmental information. 5WATERPROOF DESIGN: Altimeter barometer with waterproof design, light weight, easy to carry, beautiful appearance, multifunction to meet your different use needs.