Dual Laser Distance Meter USB Rechargeable High Accuracy Multifunction Digital Laser Measurement Tool Measuring Device SW‑DG60 Item Type: Laser Distance Meter Product Material: ABS, PC, Aluminum Alloy Maximum Measuring Distance: 60m (One Way), 120m (Two Way) Inclination Measuring Range: ±90° Distance Measurement Accuracy: ± (2mm + d x one in ten thousand) x (unidirectional) Laser Class: II Laser Type: 630-670nm, <1mW Storage Record Number of Strokes: 100 Strokes Auto Cut Off Laser: 20 Seconds Automatic Shutdown: 180 Seconds Backlight Time: 60 Seconds Battery: 3.7V 850mAh Polymer Lithium Battery (Shipped with Built in Lithium Battery) Charging Time: About 1.5 Hours Charging Specification: DC5V 0.75A Type C Full Charge Operating Time: 8000 Times in One Way, 5000 Times in Two Way Storage Temperature Range: -20°C to 60°C Operating Temperature Range: 0-40℃ Storage Humidity: 20%-80%RH Size: Approx. 115x50x24.5mm / 4.5x2.0x1.0in Gross Weight: 330g/11.6oz