Door Knock Transmitter works in conjunction with the AM-6000 Alertmaster console units or with the AM-PX/PXB Personal Signaler units.

• The AM-Door Knocker sends a wireless signal to master unit, AM-6000 to alert you through flashing the desk lamp and shaking your bed.
  
• Works up to a distance of 80 feet from base unit, AM-6000 or the wireless remote receiver, AM-RX2 for flashing lamp notification.
  
• Attach Velcro strip inside face of door and turn on transmitter.
  
• Knocking on door activates unit.
  
• 9 volt battery included.
  
• Brand new in box with one year manufacturer honored warranty.