STABILA's self-leveling, multi-line lasers make layout faster and more accurate than ever before. The LA 180 L combined with the new REC 410 Line RF line receiver measures up to 300 ft. The Industries first laser "transceiver" transmits its location to the laser via radio frequency, signaling the laser to automatically pivot on "Point A" to find "Point B". As soon as this connection is established, the laser locks into position and the transceiver automatically switches to receive mode, allowing you to pick it up and move it around the work site as a standard laser receiver. This unit also features layout lines that can be quickly established and transferred by just one person; Plumb points, horizontal beam and three adjustable perpendicular vertical beams; Full plane vertical beams cover floors, walls and ceilings; Bright, crisp lines visible to 65', or 328' with included receiver; Slide out battery drawer allows battery change without disturbing the laser's reference position; Servo motor controlled self-leveling.