The Extech IR320 Waterproof Dual Laser IR Thermometer with Alarm offers a rugged design with Waterproof (IP65) and 9.8ft (3m) drop-proof protection, and provides fast and accurate temperature measurements up to 1202°F (650°C). Its dual guided laser shows the target area between the two points at a 12:1 distance to target ratio. It has programmable High and Low Alarms with Red (HI) and Blue (LOW) visual LED alert. The lock function allows for continuous measurement, with an automatic data hold function when the trigger is released.