用自己存储的，有SD和HD的；用PoE的最安全，现在坏蛋都用高科技干扰WiFi

https://www.amazon.com/s?k=poe+security+camera+system&s=exact-aware-popularity-rank&crid=GUO0Q7JG6DB9&qid=1773283104&sprefix=PoE+security%2Caps%2C181&ref=sr_st_exact-aware-popularity-rank&ds=v1%3AzHcVjHmvku%2FWZaiyoZm2NQ%2B7OyUjyFxjO%2B7Ga7y8rLo

里面销售好的