... ; 3.Test/Hush Button with 3 LEDS 4.Low Battery alarm; CO alarm PW-916 is designed to detect the leak of ... ;10.Silence function with 3 led indicators;11.CO Sensitivity meets EN50291 or UL2034;12.Alarm Sound Level: >85dB at 10 feet (3m ... one leading professional manufacturer of fire and security alarm products, including smoke detector, co detector, gas detector, heat detector, water detector, etc ...