Are you looking for a professional, yet ? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, our professional must meet you needs. Adopted with ABS material, not easy to break and damage, suitable for home, office, hotel use. Features -Color: White. -Material: ABS. -Size: About 10.50X10.50X3.50cm/4.13X4.13X1.38inch. -Quiescent current: 105 (uA). -Working voltage: 4.5 (V). -Service life: 3 years. -Power supply: DC4.5V, 3 x AA batteries. -Will make a voice alarm when it detects a buildup of or , and instantly alert those in . -Independent temperature integrated alarm, can detect , , etc. - Features power saving design and fault self-check function, great home burning alarm. -Extremely fast alarm, simple installation, designed with creative high-decibel sound alarm. -Small and compact appearance and compact size, will not take up your home . Package list: 1 x