Does it support 2.4G/5Ghz dual band WiFi?. 【Hear and speak clearly through the APP】Built-in 2-way audio with microphone, speaker, and echo cancellation lets you listen and talk back more clearly from your phone.

(Only for 2.4GHZ Wifi). No need power plug-in. The videos can be saved at Micro SD card card(NOT included, up to 256GB).