A Useful Tool: Effectively used as an angle measurement, rotation angle measurement, acceleration measurement, angular velocity measurement tool, and also features an easytooperate digital display.LCD Display: digital color screen and 4 LED lights of the 4 corners for easy reading and use, clear and intuitive.Connect to Your Smartphone: Digital protractor can be connected via BT with the app. The measured value of the digital inclinometer is displayed live on the screen of the mobile device.Easy Carrying: Comes with a light weight and a compact size as well, the convenient storage and carrying enables both indoor and outdoor use.Charger Port: This product is powered by USB interface. Reverse connection or short circuit between signal and ground is strictly prohibited.Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!Wide Range of Applications: You can use the digital protractor in the follwing application: Interior decoration, construction area, plumbing, floors & stairs, woodwork.Colour:As ShownMaterial:Nylon fiberglassPackage Contents:1 * Digital Protractor1 * USB Charging Cable1 * User Manual (English)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 +/ 13cm.