The bell chime simply plugs into any USB power supply and connects to your doorbell over Wi-Fi through the pro app. It means you do not need to be near your doorbell or smart device when someone rings the doorbell. Design discrete design measuring just 60mm wide and 24mm deep allows the bell chime to blend into your environment. Sound small in size but big on the noise the bell chime emits a loud 120DB alert with the option to choose from 4 different melodies. The volume can also be adjusted within the app screen. The range the bell chime connects with your device over Wi-fi with a range of up to 20m. Set up simple and easy to set up with two button presses. Reset the chime with one button press and then sync with your doorbell with another button press on your doorbell device. System requirements Wi-fi connection mobile or tablet with iOS 8 or later, or Android 4.1 or later free pro account.