bubble-level to help you to check whether the tripod is horizontal or not. Equipped with rocking bar to adjust to height of the tripod, smooth and effort saving. With fixed plectrum to control to extend length to lock it tightly. Suitable to most of laser level with 5/8" interface. Note: The laser output maker is located on the output hole. Do not stare directly at the laser light. Do not disassemble the instrument and perform internal repairs by yourself. This instrument meets the laser radiation safety rating standard. Specifications: Name: Laser Level Main material: plastics'metal Laser class: class 2, output power ＜1mW  Line type: 4 * 360° Wavelength: 532nm (Green)  Battery: 2 * rechargeable lithium battery, 3.7V, 2400mAh (included)  Horizontal/vertical: ±0.2mm/10m Automatic leveling-range: ±3° Working temperature: -5℃ to 50℃ Waterproof grade: IP54 Working distance: 25m Tripod stand interface: 5/8" Level machine: 130 * 102 * 134mm / 5.12 * 4.02 * 5.28in Tripod base size: 96 * 82 * 72mm / 3.78 * 3.23 * 2.83in Wall-mounted bracket size: 161 * 71 * 89mm / 6.34 * 2.80 * 3.50in Iron-board: 100 * 60 * 12mm / 3.94 * 2.36 * 1.47in Lifting platform size: 127 * 90 * 30mm / 5.00 * 3.54 * 1.18in Carrying bag size: 220 * 233 * 150mm / 8.66 * 9.17 * 5.91in 1.2m tripod stand size: 560 * 105 * 90mm / 22.05 * 4.13 * 3.54in Package size: 440 * 215 * 255mm / 17.32 * 8.46 * 10.04in Package weight: 2455g / 5.41lb Packing List: 1 * Level Machine 2 * Battery 1 * Battery Recharger 1 * Tripod Base 1 * Wall-mounted Bracket 1 * Iron Board 1 * Lifting Platform 1 * Remote Controller 1 * 1/4inch to 5/8inch Thread Adapter 1 * Carrying Bag 1 * Guideline 1 * Tripod Stand