What this is Two RF 433MHz singlebutton transmitters designed for door access control systems. Each transmitter provides onetouch remote unlocking for compatible receivers. Why you need it Simplifies access: unlock doors from a distance without using a key or keypad. Improves convenience for frequent users and reduces traffic at entry points. Supports multiple users and scalable installations by allowing additional transmitters. Key benefits and performance Stable 433MHz RF transmission for reliable operation. Effective through walls and doors for practical everyday use inside buildings. Long transmission range up to 100 meters (328 feet) in open space, enabling convenient remote operation from a distance. Singlebutton operation minimizes mistakes and speeds access. Compatibility and expandability Intended for door access control systems using RF 433MHz singlebutton transmitters. Expandable system: supports adding up to 35 transmitters to accommodate multiple users or entry points. Operation and use Simple, onebutton control for immediate unlock commands. Pairs with receivers in access control systems that accept 433MHz singlebutton remotes. Typical applications Offices: let staff unlock doors quickly when arriving or leaving without shared keys. Warehouses: control access for loading docks and storage areas while keeping personnel moving. Gated communities or parking entrances: allow residents or authorized visitors to open gates from a short distance. Package contents 2 RF 433MHz singlebutton transmitters for door access control systems. Designed to deliver straightforward, reliable remote unlocking for access control setups that use 433MHz singlebutton transmitters, with long range and support for multiple users.