Spectra Precision DG613 and DG813 pipe lasers from Trimble are smaller in length than their predecessors. Designed for use in manholes with precast inverts and a tight radius, both models have a grade range from negative 12 to 40 percent. They are fully self-leveling over the entire grade range. The RC803 remote control provides full function control and utilizes infrared communications when in the pipe at a distance of up to 500 feet. Flexible power options provide up to 40 hours of operation with NiMH rechargeable batteries and 50 hours with alkaline batteries; alkaline batteries can be used directly in the laser without a separate battery pack. 800/527-3771; www.spectralasers.com.