FEATURES: Self-levelling cross line laser ? Projects bright crossing horizontal and vertical lines and additional plumb up and down, Working range: 10m (50m with detector), Accuracy: +/- 2mm@10m, 1/4? and 5/8? Thread Mounts ? Thread Mounts For versatility, Full-time pulse mode allows use with detector ? Detector Maintains full brightness for visibility, Locking Pendulum ? To help prevent damage to internal components. SPECIFICATIONS: Battery Type: A Alkaline Battery, Battery Quantity: 3, Hand Tool Type: Laser Level, Indoor/Outdoor: Indoor, Outdoor, Laser Level Mounting Method: Wall, Measurement Accuracy: ?1/8 in, Number of beams: 4, Laser Colour: Red, Max Laser Distance: 50 ft, Number of Measurements: 4