Description :  KERUI Y52L Wired Type Smoke Burglar Alarm Detector Sensor     Specification :      Power Supply : DC 9V  Alarm Indication : Red LED  Alarming Decibel : ≥ 80dD  Operating Temperature: -10 \u2103 to +50 \u2103  Relative Humidity : ≤ 95% RH (40 \u2103 ± 2 \u2103)  Output Form : Sound Alarming  Execution Standard : GB4715-2005  Weight : about 135g      Package includeds :     1 x KERUI Y52L Wired Smoke Detector      Details pictures :