OBEST Smoke Alarms, Infrared Photoelectric Smoke Detectors, Have a Life Span of 10 Years, and Can Be Used in Homes and Companies

• 【Quick response】Uniquely designed body, 360° air intake, all-round monitoring by photoelectric sensors, faster detection of visible particles
• 【Alarm Reminder】Built-in buzzer, once the danger of smoke and fire is detected, the red LED light of the alarm flashes immediately, and an alarm sound of more than 85 decibels is issued to remind you and your family in time
• 【Battery Life】Powered by a built-in 3V lithium battery, it has low power consumption, runs smoothly, and has a service life of up to 10 years.
• 【Self-Test Function】It has a self-test function and a low battery warning function. When the battery is low and/or the sensor malfunctions, it emits a beep every 40 seconds. The function test button can be used to reset the device back to monitoring mode after an alarm.
• 【Easy Installation】Plug and play, no wiring or network connection required, simple and convenient.

?Quick response? Unique design of the body, 360° air intake, all-round monitoring by photoelectric sensors, faster detection of visible particles ?Battery life?Using 3v battery power supply, low power consumption, stable operation, service life up to 10 years ?Alarm reminder? Built-in buzzer, once the smoke and fire hazards are detected, the red LED light of the alarm flashes immediately, and an alarm sound of more than 85 decibels is emitted, prompting to protect you and your family in time