Laser Distance Measurer, Foneso 328ft Digital Handheld Rangefinder with Mute Function Range Finder, Pythagorean Mode, Area& Volume Calculation Measuring units:m/in/ft Laser class:II Laser type:635nm,&lt;1mW Automatic remediation:Yes Indirect Pythagoras measurement:Yes Addition Subtraction:Yes Continuous Measurement:Yes Min/Max Distance Tracking:Yes Beep indication:Yes Measuring range:0.03-100m Historical data:20 Keyboard life:&gt;300,000 times Battery life:&gt;15,000 measurements Battery type:Type AAA2x1.5V(not included) Auto laser switch-off:After 1 min Auto instrument switch-off:After 10 mins 1 x Foneso F100 Laser Distance Measurer 1 x Carrying Case 1 x User Manual