Product details:

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