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 This barometer is multifunctional ,with the function of altimeter, barometer, compass and thermometer. 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. Package Included: 1 x Multifunctional barometer Regulator is equipped with safety valves, through which, when the outlet pressure increases, the released excess gas for which they are intended is admissible.