Feature:

• Protects doors, windows and other entrances.
  
• Skylink Rolling Code Technology.
  
• Supervised sensor: monitors sensors and their battery condition automatically.
  
• Lithium battery included.
  
• FCC/IC approved. CE mark.
  
• One year warranty.
  

Click the below link to obtains User Manual
User Installation Guide

Availability: Usually ships the next business day

Window/Door Sensor - WD-101
WD-101US $19.50