WOKELINE: Expertly made for the ultimate in accuracy, consistency, and convenience. The green laser lines projected by WOKELINE LASER LEVELING unit are clearly visible up to 130 feet indoors, and outside with the laser receiver in use the effective range is up to 165 feet. The self-leveling Smart Pendulum System keeps the lines level when in unlocked mode with the unit anchored using the magnetic base. If the unit becomes out of level for any reason, an ALARM will indicate that the base and unit should be checked. When the pendulum system is locked, the multifunctional unit can be safely transported or used to project square lines at any desired angle. The COATED LASER RETICLE provides improved laser clarity and prevents reflections that could especially affect outdoor use in bright light. The 520nm wavelength lasers are accurate to 1/16 inch at 30 feet, providing for true and level lines throughout all projects. The laser comes with two long-lasting batteries and a charger that includes a USB CHARGING port for convenient charging of other devices. This unit provides the same functionality of other 3x360 degree units at about half the cost. WOKELINE 360°×2 Green Self Leveling Laser Level Specifications Material: ABS, Thermoplastic Rubber Vertical Lines: 4 Horizontal Lines: 4 Self-Leveling Range: ±4.5° Laser Safety Class: Class 2 Laser Color: Green Accuracy: ±1/16 in. per 30 ft. (2 mm per 10 m) Laser Wavelength: 520 nm Max. Laser Output: 1mW Working Range: 65.6 ft. (164 ft. with laser detector) Battery Capacity: 3200 mAh Avg. Operating Time: 5-6 hr. Rec. Operating Temperature: 15-110°F (-10°C to 45°C) IP Rating: IP54 Dimensions: 3.4 x 2.8 x 4.2 in. (8.7x7.1x10.6 cm) Net Weight: 0.7 lb. (0.4 kg) Affordable Professional Leveling Our German-engineered 520nm laser produces lines accurate to within 1/16 inch at 30 feet (1 mm at 5 m). The lens coating provides improved clarity, transmittance, and efficiency up to 4 times brighter than comparable red lasers. Stable and flicker-free, this laser level is perfect for any project indoors or out with its IP54 dust resistance and waterproofing. Easily rechargeable from any USB port, the two lithium batteries give you up to 6 hours of continuous use between charges to keep you going on your big projects. Best of all, this Wokeline professional laser leveling kit doesn't charge a high premium just for its name, keeping the good things in life accessible to the working man. Read more USB Charging Port Quickly and easily recharge your level from any modern computer, adapter, or charging station. Coated for Clarity The precision coating provides improved clarity and decreased reflectivity for greater stability and brightness. Brighter Than Red Laser The lens coating provides improved clarity, transmittance, and efficiency up to 4 times brighter than comparable red lasers. Waterproof Rated IP54, this laser level can be used outdoors in light rain and in humid locations indoors without worry. Read more Stable & Accurate The German-engineered 520nm laser produces lines accurate to within 1/16 inch at 30 feet (1 mm at 5 m). Perfect Indoors or Out This laser level works up to 131 feet indoors and can reach up to 165 feet when used outdoors in pulse mode with a compatible laser receiver. Checking Calibration 1. Choose two walls at least 16 ft. apart. 2. Place the level on a tripod directly between the two walls. 3. Select any point on one wall (A) with the level. 4. Turn the level 180° and mark the resulting point (B) on the opposite wall. 5. Place the tripod as close as possible to point A and direct the laser to it. 6. Turn the level 180° and mark the resulting point (C). 7. Measure the distance between points B & C, telling you the level's tolerance. If it is beyond ¼″, the unit requires recalibration. Dust Resistant Rated IP54, your laser level withstands even dusty worksites. Read more 360° Leveler with 1 Vertical 4 Horizontal Lines 360° Leveler with 4 Horizontal 4 Vertical Lines 3D Self Leveling Laser Number of Lines & Range 5 lines, H:360°/V:180° 8 lines, 360°×2 12 lines, 360°×3 Self-Leveling Range ±4.5° ±4.5° ±4° Accuracy ±1/16 in. per 30 ft. (2 mm per 10 m) ±1/16 in. per 30 ft. (2 mm per 10 m) 1/13in. at 33ft(2mm/10m) Working Range 65.6 ft. (164 ft. with laser detector) 65.6 ft. (164 ft. with laser detector) 65 ft.(20m) or 165 ft.(100m) with detector Battery Capacity 3200 mAh 3200 mAh 2000mAh Operating Time 13-19 hr. 10-12 hr. 12 hr. Operating Temperature 15-110°F (-10 to 45°C) 15-110°F (-10 to 45°C) 15-110°F (-10 to 45°C) Self-Leveling ✓ ✓ ✓ Waterproof& Dustproof ✓ ✓ ✓