External wired doorbell, ideal for access control systems Made of high-quality ABS plastic material, environmentally friendly, waterproof and flame retardant. Anti-oxidation and fade resistant for maximum durability. 12V doorbell with high-90dB speaker. It has a clear, loud and soft "ding dong" ringtone. Ringtone: 3 chords to choose from. With jingle ring. Suitable for access control systems in homes, hotels, offices, apartments, factories, etc. feature: 1) ABS material. Small and beautiful, can be used for a long time 2) External wired doorbell for secure access control. 3) Features a soft, loud ding-dong sound and a clear playing chime. 4) Work with DC12V power supply. No batteries required. 5) Simple and convenient installation, wall-mounted. 6) With 90dB speakers. Replace old and broken ones Specification: Material: ABS plastic Color: white Voltage: DC 12V Ringtone: Ding Dong Working current: 20mA Installation method: wall-mounted Decibel: 90db Size: 86*67*24mm