Wire free smoke detector

Wire free smoke detector . Add smoke detection to your AEI wire free alarm system. The SD01 is compatable with any AEI Security wire free alarm and adds smoke detection capabilities. It can be configured to trigger your alarm system immediately upon detection of smoke. Suitable for use with any AEI Security wire free alarm system . Built in transmitter module with 9 bit site code and selectable zone . Low battery warning . Discreet case . New 434MHz Version! This accessory is NOT compatible with any 418MHz AEI Alarm (including ALL alarms purchased before July 2004) . Battery 9V PP3 (Supplied) Frequency 434MHz (433.92) Range 12-25m Site Code 9 Bit (512 Combinations)