Aiphone Intercom Doorphone with Ring Additional Adjustable Connects to Base Unit IER-2 Tone, Speaker, Doorbell, Volume,

Compatibility: WH-1ME-T, JH-1ME-T, JH-1M-T, JH-2MYED-T, JL-1M-T, WF-2MED-T, KC-1MR, KC-1GRD-T, KB -3MRD-T, KB-3MRD-2T, IE-1A, IE-1G, IE-2A, QE-1G, QE-1M-T, JD-3M-T, JE-1MK-T, JF-2MED-T Power supply: Supplied from the parent unit