DeWALT provides a facility for the collection and recycling of DeWALT products once they have reached the end of their working life. To take advantage of this service please return your product to any authorised repair agent who will collect them on our behalf.

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Battery Safety The DWHT77100 tools emit a visible laser beam, as shown in Figure A . The laser beam emitted is Laser Class 2 per IEC 60825‑1. Press the gear button (Figure A ) three times to show the indirect measurement height on the display window (Figure E ). DO NOT mix old and new batteries. Replace all of them at the same time with new batteries of the same brand and type.

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Press the gear button (Figure A ) three times to show pythagoras (Figure B ) on the display window.

If INFO appears on the display window with a Code number, perform the corresponding Corrective Action. Code Carefully read the Safety Instructions and Product Manual before using this product. The person responsible for the product must ensure that all users understand and adhere to these instructions. Position the tool at one end of the target and point the laser dot across the length. (Figure H ) shows where to position the tool if you are measuring from the top of the tool.) Insert two AAA batteries, making sure to position the ‑ and + ends of each battery as noted inside the battery compartment (Figure E ). Position the tool at one end of the target and point the laser dot across the length. (Figure G shows where to position the tool if measuring from the top of the tool.)

Special event, club or membership offers, third party promotions or prices not available to the general public Point the laser at the top of the tool laser (Figure A ) toward the wall or object whose distance you need to measure. Total Tools reserve the right to change or withdraw free delivery at any time. Estimated Delivery Timeframes NOTE: If Second measurement is larger than first: IC 601 will be displayed for a negative number. Please switch measurement points so first measurement is larger than second.

To reduce the risk of injury, user must read the Product User manual, Laser Safety manual, and Battery Safety information. Should you find one day that your DeWALT product needs replacement, or if it is of no further use to you, do not dispose of it with household waste. Make this product available for separate collection. Point the laser (Figure A ) toward the wall or object whose distance you need to measure (Figure F). From the same point, aim the laser straight ahead toward the center of the building or object (Figure J3). NOTE: Ensure the batteries are inserted in the correct manner, with the correct polarity. Setup (Load Batteries)Once the current measurement is taken (the device is not in Continuous Measure mode), you can change the unit of measure from decimal ft (6.21 ft) to fractional ft (6'02"9/16), fractional ft to meters (1.894 m), meters to inches (74 9/16 in), or inches to decimal ft. Slide the pins at the bottom of the battery door into the notches in the battery compartment (Figure E ). Position the tool at one end of the target and point the laser dot across the width. (Figure G shows where to position the tool if you are measuring from the top of the tool.) Press the gear button (Figure A ) once to show the area icon (Figure B ) on the display window (Figure A ). Press On button (Figure A ) to measure the distance from the tool to the wall or object. Refer to Setup LDM to change the reference location and / or unit of measurement.