Split-spectrum sensor technology Test and silence features in one single button Loud sound output over 85 dB(A) at 3 meters Low quiescent current consumption Surface-mount device (SMD) circuit board design Low battery warning signal
| Make | Dahua Technology |
|---|---|
| Manufacturer | Dahua Technology Ltd |
| Model code | HY-SA21A-W2(868) |
| Indoor/Outdoor | Indoor |
| Wall/Ceiling Mount | Ceiling Mount |
| Physical Specifications | Dimensions mm: φ98 x 43.1 |
| Environmental Specifications | Operating Temp oC: -10 ~ +55 C (14 ~ 131 F) |
| Additional info |
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