The KV8558 vandal-resistant doorbell, designed with mental, helps to provide a safety environment with high resolution. It support physical doorbell, which is convenient for calling. You can also view, chat with, and send permission for the visitor via mobile phone in anywhere. The device is powered by the standard PoE, and is no need to wire extra power  supply, which is easy for installation and deployment. With vandalproof and IP65 high protective levels, it is safe and suitable for high-end apartment, villa, government building, construction sites, etc.