Temperature: Accuracy, ±0.9°F/0.5°C; Resolution, 0.1°F/0.1°C; Range, 14°F to 131°F/-10°C to 55°C. Relative Humidity: Accuracy, ±2% RH; Resolution, 0.1% RH; Range, 10% to 90% RH, 25°C. Wet Bulb Temperature: Accuracy, ±3.2°F/1.8°C; Resolution, 0.1°F/0.1°C; Range, 10% to 90% RH over 50°F to 131°F/10°C to 55°C, 700 to 1,100 mbar/20.67 to 32.48 inHg. Heat Index: Accuracy, ±5°F/2.6°C; Resolution, 0.1°F/0.1°C; Range, 10% to 90% RH at 77°F/25°C over 50°F to 131°F/10°C to 55°C. Dew Point: Accuracy, ±3°F/1.8°C; Resolution, 0.1°F/0.1°C; Range 10% to 90% RH at 77°F/25°C over 50°F to 131°F/10°C to 55°C. Pressure: Accuracy ±1.5 hPa/mbar, ±0.044 inHg; Resolution, 0.1 hPa/mbar, 0.01 inHg; Range, 77°F/25°C, 700 to 1,100 hPa/mbar, 20.67 to 32.48 inHg. Connectivity: Bluetooth® Low Energy (BLE), connects to iOS devices (models 4S and later) and select Android products with Android 4.3 and higher. Logging Rate: 2 seconds to 12 hours. Data Storage: 6,220 data points. Waterproof: IP67 and NEMA-6, One meter, 30 minute submersion. Shock Resistance: MIL-STD-810G, Transit Shock, Method 516.5 Procedure IV, 4 ft drop. Battery Type: User-replaceable CR2032 (included). Storage Temperature: -22°F to 140°F/-30°C to 60°C. Dimensions: 2.4˝ x 1.8˝ x 0.9˝. Weight: 1.2 oz. Designed and manufactured in USA. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B.