Features: 1. Relative /absolute measurements interchange at any position 2. Angle and slope readout conversion.Data hold 3. The display will be turn off if you don't operate the device within , the dispaly will automatic turn off if you don't operate it within 3 minutes 4. Compact and portable , wide application 5. Four side built-in powerful magnets.Rechargeable battery Application: It is widely applied in wood processing industry (especially in furniture manufacturing dustry) for the accurate cutting of wood angle; auto repair industry for the accurate control of tire angle; maching industry for the accurate position of tool working angle as well as the roation angle of large vehicle arm etc Technical Parameters: 1. Measuring range: 4x90 2. Resolution: 0.05 3. Accuray: 0.2 4. Repeatability: 0.1 5. Battery: Rechargeable battery , 3.7V lithium battery 6. Work temperature: -10~50 7. Magnetized bottom make stick -on measurements simple and accurate 8. Absolute zero measurement based on the level surface size: 2.69 x 2.69 x 1.09 cm Material: plastic colour: white black Package Contents: 1 x DC107 Laser Angle Finder 1 x USB Cable 1 x Bag 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.