Welcome BUQU TOOLS StoreBuyer Tips:Dear, please check the size when placing an order, or communicate with us through online customer service!It can't be returned or replaced because of the size problemDear, due to different batches, shooting angle, screen resolution and other factors,Icon, the color will have color difference, but it will never affect the quality and effect. Laser intelligent goniometer Usage scenario Horizontal measurementVertical measurementCro laser projectionOne word laser projection line Measurement at any angle Two types of laser projection Built-in magnet adsorbs metal surface Clear reading on both color screen Reinforced body for durability The shell is made of aluminum alloywith integrated shock and dust prevention Lithium direct charging without fear of battery life Built-in 3.7V lithium battery with Type-C standard charging port Free conversion of angle slope Matching brackets to reduce error Function Description Top side screenOn/Off/Laser Line Input KeyMain displayFunction conversion keyLaser emiion portRange: single axis 4 × 90 ° dual axis ± 40 °Resolution: 0.1 °Power supply: 3.7V lithium batteryReference: Absolute zero point measurement based on a horizontal plane Dear friends, thanks for shopping in BUQU store!sincerely hope , can be happy and satisfied from the moment you open the parcel.if you are not satisfied with the product received,I hope you do not give us bad reviews at will. please contact us, we will definitely give you a satisfactory solution!thank you vety much-thank you!be happy!!