Door Speaker for nutone intercoms 16ohm weatherproof speaker and lighted pushbutton Dimensions: 4-7/8" x 6-1/2" x 1-3/4" Recessed mounted Plastic door speaker with lighted push button. Recessed mounted. Each door speaker includes a 16 ohm 3-1/2" weather resistance speaker for intercom communications. Dimensions: 4-7/8" x 6-1/2" x 1-3/4" These door speakers are designed to work with NuTone models IM-5000, IM-4406, IMA-4406, IM-3303, IMA-3303, IM-3204 and IMA-516. IM-5000, IM-5006 and more