InfraRed Temperature probe with Bluetooth wireless technology Adjustable emissivity Range to 662°F 5:1 distance to spot ratio Includes NIST-Traceable calibration certificate Free HACCP LE mobile app Works with Safe Food Pro App Made in the UK With an optic ratio of 5:1 and food-grade accuracy, the infraRed RayTemp Blue is perfect for close range, non-contact foodservice temperature measurements. Built with Bluetooth® wireless technology. Perform line checks faster and more accurately with readings saved directly to the Safe Food Pro App. Specifications Range -58 to 662°F (-49.9 to 350°C) Accuracy * ±1.8°F (±1.0°C) from 32 to 212°F (0 to 100°C) otherwise ±3.6°F (±2.0°C) or 2% of reading, whichever is greater Response 1 second Distance/Target 5:1 target ratio (5 inch distance measures a 1 inch diameter target area) Emissivity 0.95 default - adjustable 0.1 to 1 Resolution 0.1° / 1° Units °C/°F switchable (user reconfigurable) Water Resistance IP54 Wireless Communication Bluetooth 4.0** Battery 3 x 1.5 volt AAA, 3000 hours continuous Operating Range -4 to 122°F (-20 to 50°C), max ambient limits of RayTemp Blue body Display 1 H x 1.5 W inches (24 H x 38 W mm) LCD Dimensions 5 H x 2.2 W x 1 D inches (128 H x 56 W x 25 D mm) Weight 4.6 oz. (130 grams) Certificate Includes NIST-Traceable calibration certificate *IR accuracy can be affected by the emissivity setting, target spot size, and rapid changes in ambient temperature. Accuracy specification based on an ambient temperature of 77°F ±2°F (25°C ±1°C).