Item Number: Health Gearrx3ytsac7b-01 Package Dimensions: 12.9 x 12.7 x 6.4 cm; 360 grams Size: 220V Are batteries required?: No Item weight: 360 g Specification: Features: Pure copper electromagnetic coil with discontinuity and no electromagnetic interference. Strong blow, stable operation and long service life. Hard metal shell, not easy to deform, the sound reaches 100 db, and it is longer and safer. The surface is coated with electroplating technology to make the material more anti-corrosive and less prone to rust and corrosion. Wired portable power supply, easy to install, can be installed on the wall, ceiling and other installation methods. Choose 12V / 24V / 220V according to the voltage you use. Specifications: Condition: Brand New Color: Red Material: Metal Size: 100mm (4 inches) Power supply mode: External Optional voltage: 220V/12V/24V Alarm volume: 100dB Surface treatment: Electroplating Package list: 1 * Fire alarm bell Easy to install: Wired portable power supply, can be installed on the wall, ceiling and other installation methods. Loud knock, stable operation and long service life. High volume: The sound reaches 100dB, and it is longer and safer. Pure copper electromagnetic coil with discontinuity and no electromagnetic interference. Hard metal shell, not easy to deform, Quality material: The surface is coated with electroplating technology to make the material more anti-corrosive and less prone to rust and corrosion. Sturdy and durable Our electric doorbell has a long service life. It uses Allen screws to reinforce the welding, and the welding is stronger, which can provide you with a longer service life. Home or commercial doorbell This electric doorbell uses a stainless steel strike plate surface, which has a better anti-rust effect. This durable home doorbell makes it easy for visitors to report your presence. View more product information Easy to install: Wired portable power supply, can be installed on the wall, ceiling and other installation methods. Loud knock, stable operation and long service life. High volume: The sound reaches 100db, and it is longer and safer. Pure copper electromagnetic coil with discontinuity and no electromagnetic interference. Sturdy metal housing, resistant to deformation. Quality material: The surface is coated with electroplating technology to make the material more corrosion resistant and less prone to rust and corrosion. Sturdy and durable. Our electric doorbell has a long service life. It uses Allen screws to reinforce the welding, which is stronger, giving it a longer service life. Home or commercial doorbell. This electric doorbell uses a stainless steel plate, which offers a better anti-rust effect. This durable home doorbell makes it easy for visitors to report your presence.