This Bosch GRL 250 HV Professional Rotary Laser Level features a 3R laser class and offers a range of up to 1000 ft (305 m) with leveling accuracy of ±1/8 inch at 100 ft (±3 mm at 30 m), self-leveling range of ±5 degrees, 600 RPM, power supply of 2 x 1.5V, tripod compatibility with standard 5/8-11 thread, and includes a tripod, laser receiver, and carrying case. Serial Number: 70214313.