The most complex attribute combines safety protections with smart‑home connectivity. Some devices focus on electrical safeguards such as over‑voltage, under‑voltage, overload, and leakage protection, while others emphasize ecosystem compatibility with Tuya/Smart Life and voice assistants like Alexa or Google Home. For example, a unit with 63A protection and auto safety shielding pairs with robust energy metering, while another model emphasizes wireless control across Wi‑Fi and RF433. Matching these features to your wiring and preferred control method ensures safe, seamless operation.