1. "Made in Korea"
2. vertical 4+ horizontal 1+ vertical reticule + bottom point
3. IP54 graded dustprrof/waterproof product. (preventing outdoor dust)
4. Magnetic damper
5. Alarm for replacing battery
6. Alarm for using optical receiver
7. Outdoor work becomes available by using optical receiver
8. Fine adjusting is available tangent screw
9. Laser line shall be turned off automatically when it goes beyond the auto correction range (+/- 3 degree ) 10. Auto equipment completely when power is off. 11. Designed for absorbing moving shock.