The JDC Xplorer 2 Anemometer, Thermometer is simple to use. Press one button, and instant readings are at your fingertips. Designed for the consumer and professional in Switzerland, the Xplorer 1 is built to demanding specifations and engineered to provide a lifetime of accurate and dependable use. XPLORER FEATURES: Dimension: 3.5 x 1.5 x 0.75 in, 2 oz. (41 x 93 x 17 mm, 50 g) - One button operation - EL Backlight - Completely sealed; internal sensors - Weatherproof (can be submerged 6 feet) - Replaceable Lithium battery (included and installed) - Stainless steel back - Auto-off after one minute (can be disabled to remain on) - Included lanyard - One year warranty - Designed in Switzerland - WIND SPEED SPECIFICATIONS: - Balanced impeller is integrated into wind meter - The impeller is magnatized, producing a magnetic field when rotating which is measured internally - Damage to the impeller is unlikely due to the small opening, but repair can be performed - Units: km/h, mph, m/s, fps, knots - Range: Max 94 mph (150 km/h) - Resolution: 0.1 unit - Precision: +/- 3% - Measuring cycle: Twice per second. TEMPERATURE FEATURES AND SPECIFICATIONS: Internal thermometer is attached to the stainless steel back - Temperature adjusts quickly, although drastic temperature changes may require several minutes for accuracy - Temperature is read quickly by touching the back to an object of the same temperature - Water temperature is read quickly by submerging the unit briefly - Units: °F, °C - Range: -58°F to 212°F (-50°C to 100°C) - Resolution: 0.1 unit - Precision: +/- 0.5°F (0.3°C) - Measuring cycle: Twice per second - MSRP: $74.99. Normally ships in 1-2 business days.