This junior school physics and electricity test box is a portable experimental kit designed for classroom demonstrations and handson learning. Its foldable, compact structure and included storage box make it easy to carry and store, helping students explore basic electrical principles through multiple experiments. Key benefits Supports active learning and early interest in physics by enabling handson experiments such as a simple series circuit, a simple doorbell experiment, a solar cell experiment, an electromagnetic attraction experiment, and the magnetic field effect of an excited conductor. Well suited to junior school teaching requirements with 2.5level measurement accuracy and dualrange measurement for clearer, more reliable readings. Fast, secure connections reduce setup time. Spring quick clamps allow convenient and rapid wire attachment while front and rear card slots accept serial and parallel configurations. Durable construction and precise manufacturing: elastic metal components for firmer battery installation, roundshape parts, and stable assembly for repeated classroom use. Simple operation that helps students learn circuit principles and build confidence through repeatable experiments. Key features Foldable unique appearance and structure for compact storage and transport. Enlarged dial for clear display of measurements. Spring quick clamp connectors for convenient and fast connections. Dualrange measurement with 2.5level accuracy to meet teaching demands. Front and rear card slots that accommodate both series and parallel wiring. elastic metal material in critical parts for firm battery installation and longterm stability. Fine workmanship and roundshaped components for safe, consistent handling. Includes storage box for easy carrying and organized storage. Practical applications and scenarios Classroom demonstration: Teachers can present the solar cell experiment and electromagnetic attraction experiment to illustrate energy conversion and electromagnetism, using the enlarged dial to show students realtime readings. Lab practice for small groups: Students can work in pairs to build simple series circuits or a doorbell circuit, practicing serial and parallel connections using the front and rear card slots and spring clamps. Afterschool projects and science fairs: The portable kit provides a compact solution for students preparing demonstrations on the magnetic field effect of a currentcarrying conductor or solar cell behavior under different light conditions. Specifications and performance notes Measurement accuracy: 2.5level. Measurement range: Dualrange capability to support different experiment requirements. Materials: elastic metal components for battery contacts and clamps; robust construction for repeated use. Design: Foldable structure, enlarged dial display, spring quick clamp connectors, front and rear card slots for series and parallel wiring. Packaging: Includes a storage box for transport and storage. This test box delivers a practical, reliable toolkit for junior physics instruction and independent student exploration, with features focused on durability, ease of use, and clear measurement feedback.