Free shipping if purchased directly from the manufacturer, Jolly Logic. An awesome gift for anyone who is into rocketry, because it works with almost any rocket. This is the second generation of the Jolly Logic AltimeterTwo, the most advanced automated rocket flight analyzer ever made. New in this version are a bitmapped, animated display, larger battery, and a History feature which saves the last 100 flights. Amazingly tiny and incredibly powerful, the AltimeterTwo uses state-of-the-art pressure and acceleration sensors to perform the 10 most important flight analyses for each rocket flight, including altitude, speed, parachute ejection delay, acceleration, and flight duration. No batteries required: the AltimeterTwo plugs into just about any USB port to recharge. Its durable construction and convenient tether point make this the only rocket altimeter that can be mounted in just about any rocket--even those without a special payload section. Although data is NOT downloadable, every key statistic is compiled and presented clearly on the sunlight-readable LCD screen. For rockets only. Will not work in other types of flying things.