Aiphone MFH-U is a video monitor for use with IE series Chime Tone Intercoms and LEF/LEF-B Loudspeaker Intercom Systems. You can use it with up to 3 entries (either MF-D/DL video door station or MFW-CZ camera). The video monitor can be surface-mounted and has a brightness control and a 3-level contrast switch. It requires a DC 24V power source, supplied by a PS-24N power supply (required for every three MFH-U/MFH-UB). With the MFH-U, you can answer the door by intercom and see the caller's image on the video monitor. You can also use it for video monitoring of up to 3 entries.