Wireless Smoke Detector Alarm System Specification: Power Requirements: 9VDC Current Consumption: less than 10uA in idle mode;10 to 30mA while alarm Transmit Frequency: 433±0.2Mhz Sensitivity of Smoke: accord with UL NO.217 standard Coding Type: Fixed Code Intensity of buzzer' volume: 85 decibel 10 foots Humidity: 10% to 90% 1X Smoke sensor 1X Battery 14X Jumper 1X Manual In Original Package