Micro Smoke Alarm.

SK-20 is the smallest domestic smoke alarm in the world, this stylish smoke alarm operated by a 3V lithium battery for 10 year lifetime.

SK-20 smoke alarm utilizes photoelectric detection technology to sense smoke from different fires. Unit have a sensing chamber which uses a beam of light and a light sensor. Smoke particles entering the chamber change the amount of light that reaches the sensor. The alarm sounds when the smoke density reaches a preset level. The smoke alarm is equipped a self-diagnosticand checking feature to ensure correct operation through its service life.

The device builds the buzzer as a test button on the front cover,however if false alarms occur, the button can be used to silence the sound for 10 minutes.

The batteries is sealed in the detector, No need to replace. After 10 years of powered operation, an audible warning will occur indicating that the detector should be replaced. In case of the horn will pulse on three times for 10ms separately by 330ms every 43 seconds to warm to replace the detector. When battery come to the end of life, the smoke alarm will release short chirps to warn from low batteries. The detector It is strongly recommended to replace the detector immediately when the low battery warning begins.

You can find the product by unique code: SK-20-03.