Vacuum all around the smoke entry openingsin the smoke Alarms to remove any excess dust,lint, cobwebs, etc.6. Technical SpecificationSupply Voltage 230VAC ~50Hz, 80mABattery Back-up 10 year Rechargeable LithiumRF Frequency 868.499MhzTemp Range 0oC to 40oC (Cat 3)Humidity 15% - 95% (Non Condensing)Receiver Category Cat 2RF Performance EN 300-220EMC Performance EN 301-489RF Power +5dBm (min)Range >100 meters in free spaceMulti-Repeater Range is extended by rebroadcastingMulti-Path Improves system reliabilityNumber of RF interconnected Alarms 12 per house code group**Note: For applications with greater than 12 Alarms please contact technicalsupport for guidance.22