Features Multi Function: Based on azimuth sensing and air pressure sensing electronic technology, the device can display azimuth, direction, clock, temperature, weather forecast and altitude, highly practical. LCD Backlit Display: Designed with large LCD screen, super bright backlit display, no matter in any environment, you can clearly see the reading on the LCD. With Lanyard: The upper left end is designed with a rope port, which can be connected with the rope, making this digital altimeter easier to carry in various outdoor sports. Compact Size: This multifunction compass altimeter is compact in size and light in weight, very easy to put on your pocket or bag for carrying. High Strength: The LCD altimeter adopts ABS plastic shell, which has high strength, will not easily break or damage, resistant to falling, ensures years of use. Spec: Item Type: Digital Altimeter Material: ABS Battery: 1 x CR2032 button battery (shipped without battery) How to Use: Open the package, install the battery, read the instruction carefully, and operate according to the instruction. packing list: 1 x Digital Altimeter 1 x Lanyard 1 x Instruction Package List 1 x Digital Altimeter 1 x Lanyard 1 x Instruction