Business or Home Use Never miss anyone coming through your door with a Fosmon WaveLink Wireless Entry Alert Doorbell. Businesses can benefit by having one at the front door for retail customers and back door for deliveries. Home owners can utilize it at the front door, back door, mailbox, garage and driveway. Motion Sensor The motion sensor activates when movement occurs within 16.4ft range x 110°. This transmits a signal to the plug-in portable receiver and alerts you with a ringtone every time the sensor is activated by motion. Wireless Plug-in Receiver The portable wireless plug-in receiver plugs into any standard 110V outlet. Unique Ringtones with Volume Level You can personalize your doorbell with 58 unique ringtones and 5 volume levels. Built-in LED Indicator The receiver and transmitter feature LED indicators that create visual alerts for the hearing impaired. Easy to Install Wire free and easy to install. Versatility Each receiver can be paired with up to 10 transmitters, and each transmitter can be paired with up to 10 receivers. Specifications: Maximum 500 ft / 150 m operating range in open area 58 unique ringtones 5 volume levels LED indicators Transmitter battery: 1.5V AAA Alkaline Battery Receiver voltage: AC110V Transmitter power consumption: