From the Manufacturer
The spectra precision laser LL300 features a rugged design with hard hat rotor protection that provides superior drop and weather protection. Built to withstand severe drops of up to 3-feet (1-meter) directly onto concrete, or up to 5-feet (1.5-meter) when pushed over on a tripod means less downtime and cost due to damage caused by accidental drop or tipover and lower repair costs over the life of the product. The LL300's fully automatic self-leveling capability provides fast, accurate setup. Rechargeable Ni-Cad battery pack or alkaline batteries keeps the unit working with no downtime due to power loss. Single cross-axis manual slope mode with cross-axis self-leveling allows grade matching for basic slope work, while maintaining accuracy in the cross-slope.
Includes Rotary Laser - LL300, Laserometer/Receiver - HL450, 3 Meter Grade Rod - GR153, Rod Clamp, Aluminum Tripod - Q104025, (4) D Alkaline Batteries, Case