16 Ringtones / Clock ModeThe indoor monitor displays the current time, allowing you to keep track of time at a glance. Night Do-Not-Disturb ModeEnjoy peaceful sleep by enabling the do-not-disturb mode at night, avoiding unnecessary interruptions Talk / Remote UnlockingUnlock the door for visitors remotely with a simple press of a button on the indoor monitor convenience and security. Full-Metal Outdoor Station & WeatherproofBuilt with metal material and high waterproof rating it withstands harsh weather conditions and operates reliably in extreme temperatures -40 to +50). Stable 4-Core Wire ConnectionThe indoor monitor and outdoor station are connected via a 4-core wire, stable signal transmission and long-term reliable performance., Manufacturer: HVSYVVSRL