?? BETTER ACCURACY: AdirPro Rotary Laser Detector boasts a working range of 2,000 feet (Depending on laser). With an accuracy of 1/16 inches (1 mm) and 1/8 inches (2.5 mm), it easily directs the user to position the laser higher or lower on a grade rod. This ensures an accurate level reading all the time. ?? EASY READING: Our Laser Receiver has a dual-sided crisp clear LCD display. It displays clear and accurate readouts of the elevation, grade sensitivity, and audio and battery status. It also comes with a built-in bubble level for added convenience. ?? LONG BATTERY LIFE: Featuring an auto-shutoff feature, this Laser Detector automatically powers off after 10 minutes of inactivity. This lets you extend the device's battery life. A 9V battery will give you approximately 40 working hours of continuous use. ?? WIDE COMPATIBILITY: Our Universal Rotary Laser Detector is compatible with any Red Rotary Lasers. It works in all lighting conditions, which makes it ideal for both indoor and outdoor use. It comes with a compatible rod mounting bracket with threading on the nut and screw. ?? ROBUST CONSTRUCTION: AdirPro 790-01 LDG-8 Universal Rotary Laser Detector boasts a heavy-duty build and construction with its hard plastic housing and rubber casing. It is IP55 dustproof and water jet resistant making it ideal for all sites and weather conditions.