The automatic self-leveling Spectra Precision® GL1425C dual grade laser is the most rugged, cost-effective laser that does three jobs—level, grade, and vertical alignment. Even in harsh jobsite conditions, the GL1425C delivers consistently reliable and accurate performance, enabling you to work faster and smarter. The GL1425C has Bluetooth built in so it can work with the Spectra Precision Laser Remote App and eliminate the cost of the remote control. The laser can be controlled with your smartphone. The rugged GL1425C laser can withstand drops of up to 1 meter (3 feet) onto concrete and tripod tip overs up to 1.5 meters (5 feet). This strength, combined with full weatherproofing and dustproofing, reduces downtime and lowers repair costs over the life of the product. The GL1425C has options for receivers.The advanced HL760 Digital Readout receiver provides automatic Grade Match which allows measurement of unknown grade values between two points over unknown ground and eliminates time consuming slope calculations. PlaneLok automatically locks on to an existing elevation or vertical alignment point which eliminates all drift or possibility of error due to improper calibration or weather. The CR700 receiver is also an option when a machine mounted display elevation is required. Includes: GL1425C Dual Grade Laser HL760 Laser Receiver with C70 Clamp 105516 Vertical Adapter for Receiver CH10 Worldwide Charger 128994-00 Carrying Case Quick User Guide and Safety Instructions Key Features: Automatic self-leveling - Horizontal, vertical, and grade Accuracy 1.5mm @ 30m (1/16 inch @ 100 ft) Working range of 800m (2,600 ft) diameter Radio communication between the HL760 and CR700 digital receiver and the laser provides automatic Grade Matching and PlaneLok Bluetooth connection allows laser control with a smartphone Height of Instrument Alert - unit stops rotating when jarred to avoid erroneous readings Rotation selection of 300, 600 or 900 RPM Extremely durable and portable 5 Years warranty User Benefits: Simplifies level, grade and vertical alignment setups Increases reliability, accuracy and durability Easy to transport, easy to carry, easy to store Energy-efficient design offers long battery life Highly durable design enables the GL1425C to survive a drop up to 1m (3 feet) onto concrete Remote control or remote control app allows operation of all laser functions from anywhere on the jobsite