HC-SR04 Ultrasonic Sensor Easy-Plug

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✓ Adult Supervision: Younger Gadgeteers should build and test with a parent, teacher or older sibling nearby, especially for wiring and power steps.

✓ Batteries: Use only the recommended battery type, insert with correct polarity, and remove batteries during long storage periods.

✓ Keep It Dry: Keep electronic components and boards away from liquids and damp environments.

✓ Handle Components Gently: Avoid bending pins or forcing connectors — a gentle fit is the right fit.

✓ Store Safely: Keep small parts away from very young children, and store the kit in its box between builds.