Rolson – laser mouse 3-in-1 swivel laser level
Laser point 
Laser line 
Laser cross 
With angle scale can choose any angle with retractable pushpins and magnet 
Safety pushpins lock 
Ergonomic design mouse shape 
Changing the batteries:
To change the batteries, unscrew knob and insert 2 AAA batteries as shown in package diagram. Please remove batteries when not using for long periods of time to avoid leakage.
Caution 
Use of control, or adjustments, or performance, or procedures other than those specified herein may result in hazardous radiation exposure.