Kestrel DROPs are small, rugged, and accurate environmental data loggers. The Kestrel Drop D1 targets many markets including Transportation, Agriculture, Firefighting, Facilities Management, Medical, Pharmaceutical, Consumer and others. With Made in U.S.A quality standards and durability from NK, manufactures of Kestrel Meters, the applications are endless. From measuring environmental data during cargo transport to conditions in the field for military training to feeling secure about the climate conditions in any room, shipped box, cargo, trailer, freight container, to as simple as a room in your home or office building, you are able to measure all of these conditions even when you're physically not there. Features: View, chart, record and monitor your environmental conditions Real time, wireless, graphing functionality Access real time or chart the data via Bluetooth Low Energy (BLE) on your smart device Log options: 2 sec, 5 sec, 10 sec, 20 sec, 30 sec, 1 min, 2 min, 5 min, 10 min, 20 min, 30 min, 1 hr, 2 hr, 6 hr, 12 hr Range of 100 feet for iPhone connection