Use battery powered, leak-proof battery design to remind users to install the battery, safe and reliable. No wiring, independent installation, fast and convenient. Superior design, minimal power consumption, under normal circumstances, the battery can last up to 3 years. The buzzer can emit a high decibel alarm, and the alarm sound within 3 meters is greater than 85dB. Photoelectric smoke detection technology, excellent safety performance. After strict quality control, safe and reliable, temperature sensing smoke dual use, rapid response. Pure white design, easy to match the interior color.