Vaavud Wind Speed Meter with Smartphone App - White Compatible with Apple iPhone 4, 4s, 5. Apple iPad 2, 3, 4 gen & mini. Samsung Galaxy S2, S3, S4 Reliable electronic-free technology Measures wind speed from 4 to 48 knots (2-25m/s) Neoprene pouch included Weight: 16g / 0.6oz