This Phone Notification package from Bellman & Symfon is part of the Visit Smart Home System that helps you to keep tabs on your home. This package includes a Telephone Transmitter, Mobile Phone Sensor, Alarm Clock Receiver, and Bed Shaker. Those alerting devices in this package are already paired as a system and ready to use out of the box. Just connect your landline phone to the Telephone Transmitter, place the Mobile Phone Sensor on the screen of your cell phone or tablet, and then attach the Mobile Phone Sensor to the Telephone Transmitter or Alarm Clock Receiver. When there are incoming calls, messages, or social media notifications from your landline phone, cell phone, or tablet, you will get alerted with colored LEDs, audible sounds and bright flashing lights from the Alarm Clock Receiver, and strong vibrations from Bed Shaker which will wake up even the heavy sleepers. The backup batteries on the Alarm Clock Receiver will keep the device fully functional even during power outages. Simply place the Alarm Clock Receiver in your bedroom, and you can sleep peacefully knowing that you will be wakened up for important notifications. This package is a great signaling system to help people with hearing loss, hard of hearing, and deaf to stay in touch with family and friends.