Flashing LED Light IndicatorThe blue LED indicator on the receiver flashes when the transmitter is pressed and a signal is received. This feature is also helpful for those with a severe hearing impairment. | Memory FunctionBecause the doorbell's smart memory function, every time you power on the device, it remembers your previous melody and volume level. This feature ensures your personal touch doesn't get removed. | Easy InstallationChoose from two simple installation methods: apply the adhesive patch to fix the waterproof doorbell to your wall or use the provided screws to secure it in place. All the required accessories are included in the package for an effort less set up. |