Stanley STHT1-77138 TLM99 Laser Distance Measure 30 Meters The Stanley TLM99 Laser Distance Measure provides accurate and reliable measurements to within a 30-meter range. It can determine both distance, area and volume calculations depending on the application being carried out and has an IP54 rating for protection against water spray and dust. This model is extremely intelligent. It has a continuous measurement \"tracking\" function which finds the distance from a target quickly and easily as well as an addition/subtraction calculator for easy calculation of distances. This handy tool will make life a lot easier! Features: 30M Working range for a number of different applications either on the job site or simply at home Accuracy of +/- 2mm @10m Provides distance, area and volume calculations Continuous measurement \"tracking\" function finds distance from a target quickly and easily The measurement can be taken from either the front or back of the product Addition / subtraction calculator Rated to IP54 to protect against dust and water spray Runs on 2 x AAA batteries which come included Specification: Accuracy (dot): ± 2,0 mm Working Range (m): 0,1 - 30 m Batteries (Alkaline unless otherwise noted): 2xAAA (1.5V) Battery Life (# measurements): 3000 Operating Temperature: 0° > 40°C Weight (with batteries) (g): 100 Automatic Switch Off (Laser / Unit): 90 / 180 sec. Calculator with +/- function: ✔ Number of Beams: 1 Laser Class: 2 Laser Diode(s): 635nm Type (dot/line/rotary): dot