With the Series 9 Portable Wireless Doorbell and Push Button, you're never out of earshot when a guest or package arrives. This easily-installed and easily-accessed wireless doorbell system comes with a halo light and high quality sound for premier performance. Take your Series 9 Portable Wireless Doorbell with you to the basement, the backyard, or as far away from the sleeping baby as possible. The modern wireless doorbell comes with an illuminated halo and LED strobe lights, as well as eight preinstalled tunes. You can also download an MP3 to customize the sound of your alarm. Featuring a range up to 450 feet, the wireless doorbell button can connect to up to six transmitters simultaneously, including awareness devices and motion sensors. The wireless smart doorbell also features a sleep mode and a mute timer to easily adapt to your schedule.