Key Features：
1. For emergency help,
2. Suitable for elder, patients;
3. Waterproof;
4. Distance: 80m (no obstacle).
Technical Parameters:
| Items | 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 |
