Bundle ValueA modern STEM bundle that turns distance readings into Wi-Fi/Bluetooth-ready experiments and displayable results; Buy Together AdvantageUse the UNO R4 WiFi kit to code connected projects while ultrasonic modules bring physical sensing into the lesson; 5PCS HC-SR04 Ultrasonic SensorsUse it as five HC-SR04 ultrasonic modules for 5V distance measurement, obstacle detection and interactive robot sensing; UNO R4 WiFi Super Starter KitAdd it to create a deeper learning path with more components, guided builds and expansion ideas; Project IdeasBuild distance dashboards, obstacle alerts, automation triggers, LED matrix readouts and STEM challenges; check wiring, voltage, libraries and drivers before custom experiments