The Stanley FatMax 77-123 CLLi Cross Line Laser Kit has a 25m range for use in an interior or exterior working environment. It projects 1 horizontal and 1 vertical line to create a cross line, making this ideal for quick layout jobs. It has an Out of True level sensor, magnetically damped pendulum and a pendulum lock for safe transportation. Supplied with a 2.7m Floor to Ceiling Pole Kit. Specification Level Accuracy & plusmn 4mm @10m Working Range 25m Power 3 x AA batteries (supplied) Laser Class 1 Thread 1/4in