ALC-2-1-Basic-Self-Levelling-Laser-Flex-Power-Tools-409-235-p-The-Flex-Power-Tools-ALC-2-1-Basic-Self-Levelling-Laser-has-one-horizontal-&-two-vertical-laser-lines-at-a-90-angle-It-is-operated-with-a-simple-on-button-operation-&-there-is-a-lock-for-safe-transportation-p-p-It-has-exceptionally-bright-laser-lines-that-are-still-highly-visible-even-in-poor-lighting-conditions-The-laser-has-an-optical-warning-signal-when-self-levelling-range-is-exceeded-&-the-self-levelling-can-be