Strong magnetic base: The base has built-in strong magnets that can attach the connection system to any iron surface and is IP54 waterproof. 【Small and light】 Small and lightweight, easy to carry Large EBTN LCD screen: The large EBTN (Enhanced Background Twisted Nematic) LCD screen greatly improves the reading experience, and the bright numbers and letters on the black background make it very easy easy to read, even in direct sunlight or low light. 【Auto Power Off】The display automatically reverses when you lower your head. Automatically turns off after 3 minutes of inactivity Wide application: Angle protractor provides fast and accurate measurement in carpentry, construction, machinery, telecommunications, automotive and other areas. The product does not include batteries. Note: The data are all measured manually, please allow 1-3cm error due to differences Due to light and display, there may be some color differences, please refer to the actual item received. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!