Features:

• Provides ambient temperature from its internal sensor
• Provides harsh environment temperature from an external thermister (purchased separately)
• Measurement range: -13° to 140°F
  
• Typical accuracy of 0.5°F
• Compatible with Inovonics EchoStream
  

Specifications:

• Dimensions: 3.5” x 1.7” x 0.9”
  
• Battery: 3.0 V Lithium
  
• Battery Life: 8 years
• Compatible with Inovonics EchoStream