【360 Degree High Sensitivity Perception】: Unique structural design and advanced photoelectric maze, real-time monitoring of smoke presence, visible particle detection faster than ionization alarm. 【10 Years Battery Life】: This fire detector is equipped with a low-power 3V lithium battery for an incredible lifespan of up to 10 years, ensuring smooth operation. 【Function Test Button】: This smoke detector is equipped with a function test button for functional testing. Thanks to this, the alarm detector can be reset after an alarm or returned to monitoring mode. 【High Quality Level and Easy to Install】: The outer casing of this smoke detector is made of high-quality ABS + PC plastic, which is environmentally friendly and flame-retardant. 【Comprehensive Protection for Your Safety】: The smoke detectors have a built-in buzzer. Once the danger of smoke and fire is detected, the red LED indicator will flash immediately and an alarm sound of more than 80 dB will be emitted to quickly remind you