IXHA DBA100 Wired Doorbell for Access Control Systems. “Ding-Dong” voice output; no built-in battery; connects directly to a 12V DC power source. Specifications: Material: Plastic Color: White Power: 3W Input Voltage: 220V Wired 12V doorbell for security access control. Connects directly to a 12V DC power source. Switch not included. Doorbell volume: 90 dB Operating Voltage: 12V DC. Red to 12V (+), Black to GND (-). Features a bell sound, compact size, and wall-mount holes for easy installation. 3-Month Warranty