Adopt super-accuracy sensor from . Incorporates GPS, altimeter, barometer, compass functions, etc. Thermometer, hygrometer, time, date, alarm clock. Altitude total gain/loss, 24 hours altitude record and chart. Max/min altitude, temperature, huminity record.<br><br>24 hours air pressure trend chart. Built-in rechargable battery. LCD backlit and . IPX 4 waterproof. (Do NOT submerge in water.) Colour:Orange+Black Material:plastic<br><br>Package Contents: 1x Altimeter<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.