Best Kidde Carbon Monoxide Alarm & Explosive Gas Alarm Model KN-COEG-3

Product Name: Best Kidde Carbon Monoxide Alarm & Explosive Gas Alarm Model KN-COEG-3
New open box Kidde Carbon Monoxide Alarm & Explosive Gas Alarm Model KN-COEG-3 , no instructions, no original box. -Plug in & battery powered -Works with 9V battery (not included) -Gas sensor detects natural gas (methane) or propane. -Carbon Monoxide (CO) alarms four quick beeps, followed by five seconds of silence, followed by four quick beeps best. Displays CO concentration -Gas alarms one second of alarm on, one second of alarm off, repeating with “GAS” shown in display -Digital display and peak level button displays the peak CO level recorded by the alarm since it was last reset.