Features: Two-Note Chime For Front Door, Single-Note For Second Door; Uses A 16-Volt Transformer (C905), Sold Separately; 8-1/8 IN Wide X 5-1/2 IN High X 2 IN Deep; Replaces NuTone LB12WW And Broan RC105; Replace: NuTone LB12WW And Broan RC105; Finish: White