SUNROAD GPS Tracker Barometer Altimeter Compass Weather Forecast Thermometer .... Brand New SUNROAD GPS Tracker Barometer Altimeter Compass Weather Forecast Thermometer Barometric Pressure Tester GPS Route Tracking Multifunctional Meter Manufacturer model: AMC-107 GPS, Beidou doulble navigation system, double stalite locate, speed, distance, 9 groups route tracking. IPX4 waterproof. Altitude gain and loss, 24 hours altitude data record and rend chart. Altitude remind, setting 1-200meters. 16 directions digital compass. Temperature, hygrometer, time, date, alarm clock, LED torch. Target altitude setting. 24hours air pressure trend chart. History max/ min altitude, temperature and humidity. Description 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.