Watchguard Wireless Smoke Alarm
                    Model:ALM-D1-SMK
                
Overview
| Specifications | |
|---|---|
| Alarm Volume | 85dB–90dB at 3m | 
| Dimensions | φ98.0mm × 43.1mm | 
| Housing | ABS plastic | 
| Operating Conditions | -15° ~ -+55° C | 
| Power Supply | 3V CR123A battery | 
| Radio frequency | 433.1 MHz–434.6 MHz | 
| Sensor Type | Photoelectric | 
| Transmitting Distance | 1,200m (open space) | 
| Weight | 140g | 
| Warranty (Years) | 2 |