【Upgraded 4D Laser Level Self Leveling】KINAVEL 4D 16 Lines Laser Level: Two 360° horizontal planes (H) cover the floor, ceiling. Two 360° vertical planes (V) cover walls. Lines cross at 90°angles can visualize quickly and finish square layout. With remote controller, planes can be selected individually at a distance..【Upgraded Quality and Visibility】16 Lines Laser green beam is brighter than red. Laser level provides visibility up to 100ft indoor (±1/16in at 23ft). Outdoor pulse mode meets outdoor projects with str onger green light. IP54 waterproof and dustproof, shockproof, wear resistant, impact resistance, cold and high temperature. Safety level: Class II, <1mW power output..【Self Leveling and Manual Mode】① Laser Level Self Leveling Mode: Switch ''ON''. The laser level will self leveling within 3°, otherwise alarm will be issued. ② Manual Mode: Switch ''OFF''. Hold down ''OUTDOOR'' for 3 seconds could turn on the manual mode, now, the line laser locks into position, and you can project laser lines at any angle..【Double Batteries and Charging Port】Two rechargeable batteries (4000mAh) can work up to 8-12 hours. The power indicator will flash when the battery is weak. There is a charging port on the batteries that can be charged separately, and the battery can also be charged by laptop, power bank, car charger, etc..【Service and Package Contents】Please contact us at any time if you have any concerns. Package contains: 1x KINAVEL 4D green laser level, 1x carry bag, 1x lift table, 1x charging cable, 2x rechargeable batteries, 1x remote controller and 1x user manual. The kit has a soft carry case bringing much more convenience to carry and store the laser tool.