| Model No. | LZ-1951 |
| Voltage | DC3V(non-replaceable) |
| Standby Current | ≤5uA |
| Alarm Current | ≤120mA |
| Sensor Type | Photoelectric |
| Temperature | 0℃~+40℃ |
| Ambient Humidity | ≤95%R.H |
| Hush time | 8~10min |
| Alarm indication | Red LED & Buzzer |
| Alarm memory | Green LED |
| Sound pressure | ≥85dB(around 3m) |
| Weight | ≈56g |
| Product size | Φ46*50mm |
| Installation way | Wall or ceiling mounting |