-With the fully automatic self-leveling GL1425C laser, you can create levels, alignments, and slopes in two directions. Designed for challenging construction site use, the GL1425C delivers reliable and precise performance quickly (900 rpm). Bluetooth connections and remote control via the Laser Remote app. -The user can choose to control the laser with the Laser Remote app or the RC1402 remote control included in the laser package. The remote control offers all the same functions as the laser transmitter buttons. -Automatic leveling -Temperature-compensated automatic leveling calibrates the laser level or the slope set on the numeric display, even if the tripod is slightly tilted. If needed, the laser transmitter's automatic leveling also works in line mode. -The device's leveling alert (HI-Alert) ensures the level is maintained and prevents measurement errors by notifying of leveling changes. -Advanced functions with accessories -Automatic slope measurement -This function automatically measures the slope from the laser to the receiver. Requires a receiver (accessory). -Automatic level lock -This function locks the level to the height of a fixed receiver. The result is maximum accuracy and level stability. It eliminates errors caused by external disturbances such as: -temperature changes, wind, vibration, etc. Requires a receiver (accessory). -Slope direction setting -The slope direction can be obtained by automatic search within 15 degrees from the normal slope direction aligned with the device body. With this function, the angle between the X and Y axes no longer needs to be a fixed 90 degrees.