Whether you're expecting guests or just want to be alerted when someone's at the door, this self-powered wireless doorbell will sort you out.

It has a wide selection of settings: Depending on your mood you can choose from its 4 sound/light signal settings and 58 gentle sounds.

This wireless doorbell works on kinetic energy so it's self-sufficient, doesn't need batteries, and easy to install. No need to worry about power running out on you again.