WIRELESS DRIVEWAY ALERT SYSTEM: Security Alarm includes 1 wireless plugin receiver and 1 remote mini motion sensor.
EXPANDABLE FOR ADDITIONAL ADD-ONS: NEED EXTRA ADD-ON BUTTONS, RECEIVERS or SENSORS for your motion sensor chime system? Get it here -> www.amazon.com/sadotechwww.amazon.com/sadotech
LOOKING FOR BATTERY REPLACEMENTS or TAPE... go here -> www.amazon.com/sadotech
WANT to ADD CUSTOM TEXT or LOGO to your doorbell? ...Learn more here www.amazon.com/sadotech
LISTEN TO THE RING CHIMES BEFORE YOU BUY: Just SCROLL DOWN below to the Specification Guide link and click to DOWNLOAD the PDF file. Open it with Adobe Acrobat Reader to play all 52 ringtones.