Specifications: Name:16 Lines Laser Level Laser line model :16 lines /4D Protection class :IP54 Measurement accuracy :±1mm/7m Automatic leveling range :±3° Working range: 25m Remote control:30m Laser class 2: 515nm Applicable temperature :-10-50°C Battery capacity :3000mAh/ piece Usage time: approximately 3-4 hours Package Includes: 1x16 lines Laser level 1xRemote control 1xUpper wall bracket + iron plate 1xLifting platform 1xSmall Splint + Adaptor 1xRotating base 2xLithium battery 1xCharger How to operate remote control using mobile app There is a QR code on the back of the remote control, which can be scanned by your cell phone and downloaded according to the instructions. Features: -Two control modes: Mobile APP remote control and Bluetooth remote control, you can select the lines you needed by the remoter when you are inconvenient to move the laser level. -30 Meters large range control level, suitable for a variety of scene measurement. -With 2 lithium batteries for replacement use and ultra-complete configurations, it allows for more refined work and longer working hours.