Item Type: Solar Plastic Caliper Material: Plastic Weight: Approx. 88g / 0.19oz Range: 150mm / 6in Battery: 1 x CR2016 Button Cell (not included) Scale Process: Magnetic Stripe Film Measurement Function: Zeroing at any position; Metric to imperial conversion; With fine tuning function; No battery required, solar panel saves power Package List 1 x Solar Plastic Caliper (Battery Not Included) 1[Clear Scale] The digital caliper scale is clear, the scale film is clear, and the digital reading + scale reading is double checked. 2[Fine Tuning Function] Mini caliper with fine tuning function, not easy to slip, accurate measurement, convenient and fast. 3[Metric To Imperial Conversion] Plastic vernier caliper has large screen clear reading, metric to imperial conversion, easier to use. 4[High Strength Plastic Material] The ruler body is made of high strength plastic material, higher durability and abrasion resistance. 5[Applicability] Suitable for projects such as engineering surveying, angle measurement, student drawing, architectural design, carpentry, length measurement, and for students, carpenters, architects, designers, etc.