1、Multifunctional , 4 in 1, includes altimeter, barometer, compass and thermometer 2、Features Battery-free, maintenance-free and portable. 3、Comes with a metal hook, convenient to carry 4、With this multifunctional barometer, bring pleasure for your climbing, hiking, skiing and other outdoor sports 5、Scope of application: Gift giving, advertising promotion, camping, mountain climbing, altimeter Descriptions: This barometer is multifunctional ,with the function of altimeter, barometer, compass and thermometer. Features Battery-free, maintenance-free and portable. With this multifunctional barometer, bring pleasure for your climbing, hiking, skiing and other outdoor sports. Features: Multifunctional , 4 in 1, includes altimeter, barometer, compass and thermometer. Features Battery-free, maintenance-free and portable. Comes with a metal hook, convenient to carry. With this multifunctional barometer, bring pleasure for your climbing, hiking, skiing and other outdoor sports. Scope of application:  Gift giving, advertising promotion, camping, mountain climbing, altimeter. Specification: Color: as the picture Material: rubber Altimeter measuring range: 0 ~ 5000m Barometer measuring range: 600 ~ 1000hpa Temperature measuring range: -30 ~ 50℃ Item size: 8.5 * 6.5 * 2.8mm / 3.35 * 2.56 * 1.1inch Dial diameter: 6.8cm / 2.68inch Function: altimeter, barometer, compass and thermometer Scope of application: gift giving, advertising promotion, camping, mountain climbing, altimeter Weight:178g Package Included: 1 x Multifunctional barometer