Altimeter: 1. Display range: -2296 ft to 29500ft (-700m to 9000m) 2. Resolution: 1m/3ft 3. Altimeter measurement: Sea level altitude / Climbing altitude 4. The highest altitude record automatically during climbing: Available 5. Altitude gain/loss calculation: Yes 6. History altitude record: Record altitude every 30 minute 7. Unit: M and Ft unit switch available Barometer: 1. Display range: 300hpa to 1100hpa (8.8 to32.6inHg) 2. Resolution: 0.1hpa 3. Unit: Millibar and INhg unit switch available Thermometer: 1. Display range: -20? to 60? (-4? to 140?) 2. Resolution: 1? / 1? 3. Unit: Celsius and Fahrenheit unit switch available 4. History temperature record: Max / min temperature record Hygrometer 1. Display range: 20% ~ 95% 2. History humidity record: Max / min humidity record Compass 1. Display mode: 360o with eight directions 2. Resolution: 1° Weather forecast 1. Forecast: Forecast for future 12 to 24hours weather 2. Four weather status: Sunny-Slight sunny-Cloudy-Rain Time & Date 1. Display mode: 24H or 12H available LED torch 1. LED torch: High-light LED torch Others: 1. Backlight: 5 seconds high-light LED backlight 2. Waterproof: IPX4 3. USB charge 3. Item weight: 0.31lb / 0.14kg 4. Product dimension: 3.94x2.6x0.67in / 10x6.6x1.7cm Quick Guide - Turn ON/OFF: Long press silver button in the center. This meter inside is rechargeable battery, usually no need to turn it off. Long press silver button more than 7 second scan turn off the meter, but this will lose all data so not suggest turn it off.

History max/ min altitude, temperature and humidity. Target altitude setting. 24hours air pressure trend chart. 16 directions digital compass. Temperature, hygrometer, time, date, alarm clock, LED torch. Altitude gain and loss, 24 hours altitude data record and rend chart. Altitude remind, setting 1-200meters. GPS, Beidou doulble navigation system, double stalite locate, speed, distance, 9 groups route tracking. IPX4 waterproof.

Item Weight: 0.26 Pounds. Are Batteries Included: Yes. Number of Batteries: 1 Lithium Polymer batteries required. Power Source: Battery Powered. Display Type: LCD. Brand: AMTAST. Date First Available: November 17, 2017. Best Sellers Rank: #117,155 in Sports & Outdoors. Customer Reviews: 3.1 out of 5 stars 126 ratings 3.1 out of 5 stars. : B077KRKMP2. Part Number: ?AMC-107. Manufacturer: ?SUNROAD. Brand Name: ?AMTAST. Item Weight: ?0.26 Pounds. Package Weight: ?0.14 Kilograms. Item Package Dimensions L x W x H: ?6.2 x 4.3 x 1 inches.