Item Type: Digital Protractor_x000D_Material: Plastic_x000D_Size: Approx.70x70mm / 2.76x2.76in _x000D_Product Model: DXL360 _x000D_Built-in Battery: Rechargeable lithium ion battery 3.7V_x000D_User Interface: Backlight mono-color LCD_x000D_Charger Interface: 5V 500mA Mini B type USB interface_x000D_Resolution: 0.02_x000D_Accuracy: 0.1_x000D_Measuring Range: Dual axis 40_x000D_Magnetic Base: Set on the four corners_x000D_Plug & Voltage: US 100-240V_x000D__x000D_How to Use:_x000D_1. POWER (in normal operation, this button is mainly used to switch the angle ruler)_x000D_2. ZERO (press the button, the current angle will be set to zero)_x000D_3. HOLD (after pressing this button, the LCD will lock the display of the angle when pressed; the [O] on the screen will flash, indicating that the current angle reading is locked)_x000D_4. SET (press and hold for 3 seconds to enter the menu mode and set various parameters) 1Widely used in machinery manufacturing, automobile maintenance, healthcare industry, wood processing, instrument testing, home decoration, etc. 2The digital protractor is designed with mono?color LCD with backlight, friendly for the users, large LCD displays clear angles. 3Digital protractor could be rechargeable.It is very convenient by using it, connecting the USB cable to the unit and a computer's USB port. 4There are magnets on the underside and on all sides, the buzzer alarm can be set at a specified angle. The V?groove design of the shell can be easily placed on corners and round pipes. 5Can measure dual axis tilt angle, measuring range is dual axis 40, 0.1 high accuracy , 0.02 high resolution. 1 x Digital Protractor 1 x Data Cable 1 x Plug 1 x Instruction Manual 1. Please allow 1?2in error due to manual measurement. Thanks for your understanding._x000D_2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.