Key Features： 

1. For emergency help, 

2. Suitable for elder, patients;                                                 

3. Waterproof;

4. Distance: 80m (no obstacle).

Technical Parameters: 

• Power:Lithium C1620 
• Battery Life: >1 year 
• Frequency:315/433MHz 
• Range: 80 meters (open area) 
• Working Temperature: -20℃~50℃ 
• Working Humidity: Max 95% (no condensing) 
• Dimension: 43mm*31mm*12mm