Dahua's IP speaker is designed to suit a variety of applications. It supports ONVIF protocol , ensuring compatability with 3rd party cameras. It is powered by PoE+ for easy installation and use. The speaker has an built-in microSD slot and an internal storage capacity of 512 MB. The built-in microphone allows for two-way communication. The speaker can be used for outdoor applications thanks to its IP67 ingress protection rating.