Features:<br> Adopt super-accuracy sensor from Swiss.<br> Altitude total gain/loss, 24 hours altitude record and chart.<br> Max/min altitude, temperature, huminity record.<br> 24 hours air pressure trend chart.<br> Incorporates altimeter, barometer, compass functions, etc.<br> Thermometer, hygrometer, time, date, alarm clock, LED torch.<br> Built-in rechargable battery.<br> LCD backlit.<br> IPX 4 waterproof.<br> Note: Please do NOT submerge in water.<br> Specifications:<br> Altimeter:<br> Altimeter range(-700 to 9000m/-2296 to 29500ft)<br> Resolution of 1 meter/feet<br> Max./Min. memory for altitude<br> Altitude history and graphical display of the last 24 hour altitude readings<br> Altitude total gain or loss 44999 meter/feet<br> Barometer:<br> Pressure range 300hpa to 1100hpa(8.84inHg to 32.44inHg)<br> Resolution of 0.1hpa(0.01inHg)<br> 24 hour pressure history and graphical display<br> Electronic pressure weather forecast(sunny, slightly cloudy, cloudy, rainy)<br> Pressure trend indicators<br> Thermometer:<br> Range from -20 to 60 (-4 to 140)<br> and selectable<br> Max./Min. memory for temperature<br> Hygrometer:<br> Relative humidity(20% - 95%)<br> Max./Min. memory for relative humidity<br> Package:<br> Material: Plastic<br> Color: Black + yellow<br> Built-in battery: 300mAh<br> Item size: 10 * 6.5 * 2cm / 3.9 * 2.6 * 0.8in<br> Item weight: 70g / 2.5oz<br> Package size: 16 * 11 * 3.5cm / 6.3 * 4.3 * 1.4in<br> Package weight: 128g / 4.5oz<br> Package List:<br> 1 * Altimeter<br> 1 * Charging Cable<br> 1 * Lanyard<br> 1 * Cleaning cloth<br> 1 * User Manual (English)<br>Note: <br>1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. <br>2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!<br>About Shipping: <br>1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly.<br>2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.<br>3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping!