The rugged, electronicless Vaavud wind meter turns you smartphone into a high-tech meteorological tool. Works with iPhone 4, 4S, 5, 5C, 5S, Samsung Galaxy S3, S4 and HTC One. You can find more dateails and order the produscts in our paragliding online store: http://www.stenar.si/index.php?route=product/product&product_id=473