Features:

• Receive signals from up to 80 feet away.
• 3 ways alert indicators: visual, audio and vibrator.
• Transmitter plugs directly into phone jack.
• 1024 household code combinations to prevent interference.
• 9V rechargeable (battery and charger included) or 9V Alkaline
  for the receiver (pager).
• Sends signals to compatible receivers up to 80 feet away.
• 10-year battery operated telephone ring transmitter