With an operating range of nearly half a mile (2620 ft.), the RL-H4C self-leveling rotating laser can be used on most jobs, from pools and patios to site grading and excavations. The battery lasts up to 100 hours. The laser’s accuracy is within 10 arc-seconds horizontally and within 5 degrees vertically. The case’s ingress protection rating of 66 blocks dust and water. Topcon Positioning Systems Inc. 925-245-8603. www.topconpositioning.com