Designed specifically for paragliding by paraglider pilots, the ascent vario brings you everything you need in an affordable package...and its small enough to wear like a watch. weight: 1.41 oz / 40g size / dimensions: 1.75" x 2.36" x 0.63" 44mm x 60mm x 16mm Features: temperature compensated absolute and relative altitude (m or ft) vertical speed with adjustable averaging (m/s or ft/,in) while flying, a single button press briefly displays: relative (or absolute) altitude / temperature max altitude / max climb rate time / flight duration volume flight data recorded for up to 200 flights Additional Features: user adjustable flight detection recorded flight log data includes: flight number, date, launch time, flight duration starting altitude, max altitude, ending altitude max 3 second lift, max averaged lift, max sink rate max and min temperatures flight data and user settings are saved even when the battery is fully discharged adjustable sink alarm large 30mm (1.2") diagonal, high-resolution graphical display (128x64 pixels) rechargeable lithium polymer battery with charge indicator battery life: up to 10 hours flying time / 4 months standby battery charging options include wall (115/220 Vac), car (12 Vdc), and computer USB Purchase includes: Vario with black wristband mini USB cable, wall charger, and car charger (USA or Europe)