Aiphone LEM-1DL Intercom Master Station with door release button

Aiphone LEM-1DL Intercom Master Station This model features a door release button The LEM-1DL Series is an audio only communication and entry security system. The system can start as a one door, one master kit using the LEM-1DLS box set, and can be expanded to up to 4 inside master stations. Each master allows for communication with the outside door and door release control. Door release (N/O contact) Calling and 2-way communication Call tone & voice volume control AC 12~16V or DC 12~24V powered. Compatible with any LE or LS series door station.