| Operating Voltage | 120V AC 60 Hz |
|---|---|
| Operating Current | 20 mA (standby/alarm) |
| Temperature Range | 40�F (4�C) to 100�F (38�C) |
| Humidity Range | 10% to 90% relative humidity (RH) |
| Interconnects | Up to 18 units of First Alert or BRK Smoke, CO and Heat Alarms. Maximum of 12 smoke alarms |
| Height (In.) | 1.50 |
| Length (In.) | 3.50 |
| Standards | UL 217, UL2034, UL539, ULC S-531, CSA6.19 and ULCS-530 for accessories. |
| Warrenty | 10 Years Limited |
