The laser has a tilt function that ensures that you always work with the right size, if the tilt function is turned on, the laser will continue to monitor the height and block if the height changes due to, for example, severe shocks or unwanted movement of the laser. The manual slope function allows you to quickly and easily set a slope to either the x- or -y axis. The laser has an IP66 construction that protects the laser from dust and moisture. The laser has an accuracy of 4.8mm/100mtr and is equipped with a removable Li-on battery pack. The large working range of 600 meters (with receiver) and the long operating time of 55 hours make the laser suitable for the demanding user. The Levelfix 550H comes complete with the rugged digital DLD100R receiver. The DLD100R has a large reception window, an illuminated and bright display and is designed for everyday ease of use. This unique receiver indicates the distance to the 0 line in metrics. The receiver has an adjustable 0 position The receiver is robust, impact-resistant housing and is waterproof (IP66).