Electronic Self Leveling 3D Red Beam Leveler Cross Line Alignment Line Leveling Instrument Features: Designed with a rubber coating, it is non-slip and waterproof, allowing users to work well in the work environment. The instrument uses a 2000mAh battery to extend the run time. In addition, this tool can be used at the job site, charging directly when removing the battery. The manual mode has a double-slope function that allows the user to perform a slope of ±3° X-axle and Y-axle, as well as locking lines at any angle. The dual ramp mode is very effective when checking levels, setting drains, or performing other slope work. It is the ideal tool for large workplaces. Using the receiver in bright light or outdoors, the energy-saving pulse mode extends the ray range to 50m for longer working hours. The visibility adjustment feature allows the user to select line brightness under different lighting conditions. This instrument features electronic self-balancing with a high accuracy of ±1 mm/5 m. A 360° horizontal and two 360° vertical lines can be selected individually for the job site application. The two vertical lines intersect at an angle of 90°, allowing the user to quickly visualize and complete the square layout. Specifications: Condition: Precise: ±1 mm/5 m Rubber Coating Design: Yes Built-in Level Bubble: Yes Silver Aluminum Cover Available: Yes Working Range: 20-50M Wavelength: Red 660nm Battery: 2 x 18650 battery (Not included) Working range 20-50m Laser-type Red 660nm,Green515nm Leveling precision ±1mm/5m The laser class Second, <1mw Usually automatic leveling range ±3° Service ability 2*3.7V 2000mAh 18650battery(Not included)   Eu AC power supply Equilibrium duration, usually <4ST Tilt function Yes (no blinking) Accuracy adjustable Using the receiver Yes (range 50m) operating temperature -10℃... + 40℃ Weight 0.65kg storage temperature -20℃... + 70℃ Size 130*90*130mm/5.1*3.5*5.1in Relative air humidity, maximum 90% Tripot install 1/4''5/8'' Package List: 1*Leveling Instrument 1*Rag 1*Bag 1*Adapter 1*Instruction Manual 1*Marking Target 1*Battery Charger