[MULTIPLE TUBE COMPATIBILITY] This DIY Nuclear Radiation Detector Kit supports J305, M4011, STS 5, and SBM20 tubes on its PCB board, offering flexibility for various projects. [AUDIBLE AND VISUAL S] The kit features sound and light indicators that users to hazardous radiation levels in real-time, enhancing safety during monitoring tasks. [COMPREHENSIVE ASSEMBLY KIT] Includes all essential parts like a calibrated detector board, holder (batteries not included), wires, and an acrylic cover for easy assembly. [INSTRUCTIONAL PDF INCLUDED] A user-friendly PDF manual is provided with clear instructions and examples to assist both beginners and experienced developers in using the kit effectively. [FRIENDLY CUSTOMER SERVICE] If you have any questions about the product, please email us. We will do our to solve the problem for you.