Fire Alarm Bell 4 inches 100Db Security (12V)

Strong tapping, stable and long service life. The surface is coated with electroplating technology to make the material more anti-corrosive and less prone to rust and corrosion. Hard metal shell, not easy to deform, the sound reaches 100db, and it is farther and safer. Pure copper electromagnetic coil with discontinuity and no electromagnetic interference. Portable wired power supply, easy to install, can be installed on the wall, ceiling and other installation methods.