Feature:1. High Accuracy & StabilityUsing advanced laser technology and high-definition optical lens to ensure accurate measurement. The accuracy is up to 2mm, and the measuring distance is up to 164ft/50m; and it can be switched between feet/inch/meter/feet-inch. Laser class: class II, power output Specification:Specifications:Model: D3-50 / D3-70 / D3-100 / D3-120 (Optional)Material: ABSMeasuring Range : D3-50: 0.05m-50mD3-70: 0.05m-70mD3-100: 0.05m-100mD3-120: 0.05m-120mMeasuring Accuracy: ±2mmDisplay Accuracy: 1mmLaser Class: Class IILaser Power: 1mWArea / Volume Measurement: √Pythagorean Measurement: √Addition and Subtraction: √Storage Function: √Continuous Measurement: √MAX/MIN Measurement: √Multi-line Display: √Screen Size: 2.4 inchesWaterproof Level: IP54Operating Temperature Range: 0 - 40 Storage Temperature Range: -10 to 50Battery: 3 * AAA batteries (Not included)Laser Auto-off Time: 30 Seconds laterMachine Auto-off Time: 3 minutes laterItem Size: 116 * 54 * 24mm / 4.56 * 2.12 * 0.94inItem Weight: 90g / 3.17ozPackage Weight: 170g / 5.99ozPackage Size: 15.5 * 11 * 5.8cm / 6.10 * 4.33 * 2.28inPackage List:Package List:1 * Laser Distance Meter1 * Storage Bag1 * User Manual (English)