Description:  7 Inch/230mm, Digital Angle Finder Protractor,4 In 1 Digital Protractor Ruler & Level Tool  Multifunction Level Ruler Angle Measuring Tool With Horizontal, Vertical & Circular Level.  Specification:  Material: Plastic.  Color: Black.  Size: 2.3 x 3.5cm/9 x 1.38inch(L x W).  Measurement Accuracy: 0.1.  Special Features: Spill proof.  Display Type: Led.  Batteries Included: Yes.  Power Mode: Battery.  Features:  High Accuracy: The precision is ± 0.5°, suit for most situation of indoor/outdoor use.  Muti function Tools: Angle finder+level tools+ruler.  Up To 999°Angle for Measuring: This angle can be measure from 0°-999.9°.  Strong Material, Anti-Flex: The ruler made of nylon glass fiber, high stiffness and strength,  anti-flex.  Button Battery: This product packed with a button battery, which make the more easier to use.     To replace Battery:  ①Pull the Battery Container Out.  ②The Negative Pole of Battery is Upside, Positive Pole is Downwards.  ③Push the Battery Container Back in.  Package included: 1 x Digital Angle Finder Protractor