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                  SPECIFICATION
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- Detects garage door open and activates alarm
- LED flash light when the alarm sounds
- Water and weather resistant for the transmitter
- External trigger input magnetic sensor 
  for slide doors
- Special garage sensor and RF transmitter 
- Transmission distance 30-40 meters
- Battery low indicator LED for Tranmitter and
  Receiver
- Power On/Off switch
- Sound On/Off switch
- Transmitter 3V lithium battery(CR2032) included
- Receiver 3 x C size batteries (not included)
- Programmable