This versatile Hampton Bay Door Bell works in any home installation. For a Wired installation, you'll need a Wired Push Button and a 16 VAC/10 VA Low-Voltage Transformer. To use wirelessly, you'll need 3 "C" batteries and a Hampton Bay Wireless Push Button. Replacing your current basic Door Bell with a new stylish Door Bell is easy. Installation usually takes less than 30 minutes. Sync's with all Hampton Bay Brand and Heath Zenith Brand Push Button. Adjustable volume control at 85 dB maximum loudness. 16 selectable tones to choose from Contemporary styled doorbell molded in plastic cover with a brushed nickel finish.