Feature: 1. [MULTIFUNCTIONAL TOOL] The digital altimeter is based on azimuth and barometric sensing electronics and displays bearing, direction, clock, temperature, weather forecast, and altitude. 2. [BACKLIGHT DISPLAY] The digital altimeter has an ultra bright backlight that allows you to clearly see the readings on the LCD display no matter what environment you are in. 3. [ABS HOUSING] The ABS housing of the digital altimeter has good wear resistance to ensure the internal components. 4. [PORTABLE SIZE] The special hook design of this digital altimeter makes this device easier to carry in various outdoor sports. 5. [SIMPLE OPERATION] This digital handheld altimeter is key operated, with responsive keys, very convenient for outdoor use. Specification: Item Type: Digital Altimeter Barometer Material: ABS Battery: 1 x CR2032 button cell (shipped without battery). Package List: 1 x Digital Altimeter Barometer1 x Instruction