Laser Distance Measure Battery Powered Handheld Tape Digital Laser Measurement Tool for Indoor Decoration Construction Item Type: Laser Rangefinder Material: ABS + Silicone Model: LDM-60C Battery: Rechargeable Lithium Battery 3.7V 1500mAah (Built in Battery) Basic Parameters Test Range: 0.05~120m (0.16~394 Feet) Measurement Accuracy: Typical Value: ±1.5mm/0.05in Accuracy Class: II Minimum Value Display: 1mm/0.03in Unit of Measurement: m, in, ft Laser Safety Standard: Class II Laser Type: 635nm, <1mW Laser Beam Diameter (B): 9mm/0.35in (At a Distance of 10 Meters/32.8ft) 45mm/1.7in (At a Distance of 50 Meters/164ft) Inclination Sensor Range: ±90° Accuracy of Tilt Sensor: ±0.5° (With Laser Beam) (C) Standard Deviation: ±0.5° (With the Shell) (C) Area/volume Calculation: Yes Calculation of Area and Volume Addition and Subtraction: Yes Indirect Measurement Using Pythagorean Law: Yes Indirect Measurement Using Tilt Sensor (automatic Horizontal Distance Measurement): Yes Inclination Sensor: Yes Addition and Subtraction Function: Yes Continuous Measurement: Yes Maximum and Minimum: Yes High Definition Backlit Multi Line Display: Yes Voice Playback, Voice Prompt: Yes Waterproof and Dustproof: Ip54 Number of Historical Records: 99 Working Temperature: -10~50℃ Storage Temperature: -20~60℃ Maximum Air Humidity: 90% Automatic Laser Shutdown: After 30 Seconds The Instrument Turns off Automatically: After 3 Minutes Compatible: Indoor Decoration, Construction, Furniture