Usage Tips:Features 1. Excellent quality: Equipped with a thickened ABS shell. It is more durable, slightly dustproof, waterproof and drop resistant, and has a longer usage time. 2. Precisions chip: supports remote control operation, laser brightness can be freely adjusted, and oblique line mode is supported. 3. Configure touchpad: Press and hold H to increase brightness, press and hold V to increase brightness, and press in the middle to turn on strobe mode. 4. Lithium ion batteries: Lithium ion batteries made from large capacity 18650 batteries have a longer battery life and can be recharged and recycled. 5. Excellent visibility: The laser level adopts a high-precisions, stable, and high-intensity green light emitter, making the laser line more precise, bright, and bright. It can be used indoors or outdoors. Specification Laser power: 10mw Laser wavelength: 515nm (green) Laser accuracy: 1mm/6m Effective range: 15m/ 3m (indoor) Automatic leveling time: 8s/ 1s Laser line: 8/12/16 Light direction: horizontal and vertical Power supply: lithium-ion battery Battery life: 3h 0.5h Working temperature: -15 ~50 Working environment: Recommended indoor Charger specifications: 5V-1-2A Material: Aluminum alloy+ABS Color: Green Size: 17 x 14 x 14 cm Weight: 800 g Package Include: 1x Professional laser level 1x Large capacity lithium battery 1x Charger 1x Anti fall tool kit 1x Instruction manual