Topcon RL-SV2S 313990772 Self-Leveling Dual Grade Rotary LaserTopcon RL SV2S 313990772 Self Leveling Dual Grade Rotary Laser with D Cell or Rechargeable Battery Option Package 1 : D Cell Batteries and LS 80L Receiver Package 2 : Rechargeable Battery and LS 100D Receiver Features Dual slope Long range Self Levelling Available in D Cell as well as Battery Version This laser is for general construction or engineering projects and designed to be used for flat work, single grade or dual grade applications. Slopes up