Line Laser KLL-D300 Series Overview
The Line Laser KLL-D300 Series redefines precision and versatility for professional layout work. This comprehensive series includes the KLL-D301/302, advanced Line Laser Levels that project onto eight surfaces for full 360° coverage, and the groundbreaking KLL-D303, a 3D model that projects onto twelve surfaces for the ultimate in spatial planning. Available in both high-visibility Green Beam and standard Red Beam variants, these tools are engineered for the most demanding job sites.
At the heart of the D301 and D302 models is their function as a highly efficient Self-Leveling Cross Line Laser. They automatically level within ±3° in under 5 seconds, ensuring an accuracy of ±3mm/10m for flawless horizontal and vertical alignment. This robust Self-Leveling Cross Line Laser system, combined with an IP54 rating, guarantees reliability in tough conditions. For professionals seeking the pinnacle of layout technology, the KLL-D300 Series offers a range of Line Laser Levels to suit any project complexity, from basic alignments to full 3D modeling.

Line Laser KLL-D300 Series Specifications
| Model No. | KLL-D301R/D302R/303R | KLL-D301G/D302G/303G |
| Light Source | Red Beam | Green Beam |
| Laser Wave Length | 635nm | 520nm |
| Laser Diode | 100mw | 30mw |
| Laser Safety Class | Class 2 | |
| Leveling Range: | ±3° | |
| Leveling Time | <5 sec | |
| Leveling Accuracy | ±3mm/10m | |
| Power | Li-ion 18650 Battery 3.7V 4000mAh | |
| Operation Time | About 4h | |
| Operation Temperature | -10℃~+50℃ | |
| Mounting Thread | 1/4″-20 | |
| Waterproof | IP54 | |









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