The wire design ensuring stable signals and is not easily interfered with, avoiding the common problems of battery life and poor signals in doorbells, ensuring long term use Using great sound components to ensuring clear and pleasant ringtones, allowing you to enjoy crisp doorbell prompts at home or in the offices at all times Perfect for homes, shops, and mall, this wire doorbell is enough for various control scenarios 38 music option: Provides a wide ranges of music choices, allowing users to freely choose according to their personally preferences Crafted from ABS, this doorbell ensuring and durability for long-lasting use, Manufacturer: kokdid