Magicfly 7"LCD Wireless Video Doorbell Door Phone Intercom System Night Vision, Waterproof Wireless version for easy and quick installation/2.4GHz frequency ensures stable signal transmission/Up to 30 meters transmitting distance for general households Auto & manual photo shooting Indoor unit can save at least 100 photos with built-in memory Rain & corrosion proof Aluminum alloy made 16 ring tones Adjustable volume & LCD brightness Back-stand of indoor unit for easy relocation AC power source or Lithium battery for both units Rechargeable Lithium batteries included Low power consumption Luxury 7 Color TFT LCD with touch key panel/High definition visibility Hands-free intercom with built-in microphone and speaker/Electric-lock control/Infrared night vision with 6 IR LEDs