This professional self-leveling laser level features 2 lines for a broad array of alignment and precise measurement. Automatic self-leveling mechanism. Audio warning when beyond auto leveling range and wide applications for auxiliary tiles fixing, wall decoration, floor tiles fixing, stair handrails and more. 360 degree rotatable base with the fine-tuning knob, quickly identify the target. Alternating current or direct current dual-use, high efficiency and convenience and the button is waterproof, wear-resisting and feels exquisite, easy to operate. The thickened metal base provides stable support and it is shockproof, shatter-proof and easy to carry with the plastic case and carrying strap, Automatic self-leveling mechanism. Audio warning when beyond auto leveling range and wide applications for auxiliary tiles fixing, wall decoration, floor tiles fixing, stair handrails and more. 360 degree rotatable base with the fine-tuning knob, quickly identify the target.