Ideal for a block of flats & apartments, the Sound Sensor detects existing acoustic or repeating sounds, such as door entry/intercom systems and triggers a 100dB alarm with bright flashing LED lights to keep you alerted to new visitors. It attaches to non-wireless devices & converts them into wireless alerts with a 300m range, and sends a wireless signal to the Chimeflash Receiver (sold separately with our Chimeflash Doorbell). The Chimeflash Sound Sensor is an excellent device that ensures deaf or hard-of-hearing individuals are always alerted to visitors via extra loud sounds and bright strobe lights. Key Uses & Features: Existing Doorbell/Intercom Aid: Attaches directly to existing doorbells or intercoms, detects the sound, and then flashes & chimes to notify you.Versatile Alerts: Connects with the Chimeflash receiver (sold separately) to provide a 100dB sound, strobe lights, or both.Multiple Alerts: Enables pairing up to three transmitters, allowing for monitoring different areas (e.g., front door, back door, intercom).Easy Installation: Features wireless installation and a simple microphone sensor to detect sounds.