The Visit push button transmitter works as a wireless doorbell. When someone presses it, it will send a signal to the Visit receiver that notifies you with flashes, sounds and vibrations. It can also be used as a portable alarm to notify a relative or caregiver that you need assistance. Please be aware that the transmitting range of this transmitter is affected by internal walls that are constructed of brick, concrete or steel. For a greater transmission range you should consider using our BE1023 Bellman Visit Door Transmitter that detects the sound of an audible door bell.