Track door and window status without adding complexity to the access stack. The Ubiquiti USL-ENTRY-US is a battery-powered SuperLink entry sensor built for indoor-only deployments, giving security teams clear open/closed monitoring at the perimeter. With up to 6-year battery life, it reduces routine service calls and keeps maintenance predictable across distributed openings. That matters in environments where dozens or hundreds of doors and windows need consistent status reporting without frequent battery replacement. Its compact 0.2 lb design makes it easy to place where discreet monitoring is preferred. For teams standardizing on Ubiquiti access control, it adds a practical layer of visibility for doors and windows that need to be monitored rather than locked. Use it to extend awareness across offices, secured rooms, and interior access points where knowing the state of an opening is as important as controlling who can pass through it.