Laser Diode: 635 nm, < 1 mW Measurement Range: 0.05 - 40 m Laser Class: 2 Measurement Time Typical: < 0.5 s Measurement Time Maximum: 4 s 1.5 Volt Battery Automatic Deactivation: 5 Minutes Weight Approximate: 0.18 kg Laser Class 2: Laser Class for Measuring Tools Precise Measurements - Small and Easy State of the Art Laser Technology Fits in Any Shirt Pocket Due to Small Dimensions of 100 x 58 x 32 mm Easy Operation: One Button-one Function Keypad Ideal Tool for Every Construction Site Because it is Dust and Splash Protected (IP 54) and it is Equipped with Softgrip Other Functions Such as Continuous Measurement, Addition and Subtraction Function for Considerable Time Saving