4 Wires Wired Door Bell Chime DC 12V Vocal Wired Doorbell Welcome Door Bell For Office Home Security Access Control System 4 Wires Wired Door Bell Chime DC 12V Vocal Wired Doorbell Welcome Door Bell For Office Home Security Access Control Systemsupporting doorbellWhite Specification: Brand new Material: Plastic Color: White Operating Current: 20mA Wired door bell 12V for security access control Connect to DC 12V power directly Volume of doorbell: 90db Working Voltage: DC12V Red to 12V(+), Black to GND(-) Features a bell sound, small size and wall-mount hole, very easy to install DC12V Wired Door Bell For Hotel / Apartment / House Door Access Control System with 4 wires, no need battery Note: Wired Doorbell for access control system. "Ding-Dong" Voice output without built-in battery, connect to DC 12V Power Directly B04 B06 B08 B12-A B12-B DB01 38 Sound Adjustable Door Bell 12V Wired and Battery two types Doorbell for Door Access Control System 38 sound Specification: 1.Material: Plastic 2.Color: White 3.Power:3W 5.Wired door bell 12V for security access control 6.Connect to DC 12V power directly 7.Switch is not included 8.Volume of doorbell: 90db 9.Working Voltage: DC12V 10.Red to 12V(+), Black to GND(-) 11.Features a bell sound, small size and wall-mount hole, very easy to install Wiring Diagram Red: + 12 V Black: GND Green: BELL1 Yellow: BELL2 (The access control keypad, power supply, locks, exit button in the picture as below are not included in the package, need to order extra. ) Payment --We accept all payment method available. --On aliexpree,money will be only released to us after you confirm you have received the products. Shipment --Shipment will be effected without any delay. --Shipping will be handled by HK post or EMS, TNT, DHL, FEDEX, UPS with tracking number. --For HK post, shipping time is about 30-60 working days. --Other method, it is about 3-12 working days for delivery. Pls be assured that we will help track shipping information and will let you know as soon as possible. Import Tax or Duties --Pls note that Import tax or Duties and other import fee is recipients' responsibility. --Pls take tax or duty into consideration before making order, especially for large orders. Feedback --Positive feedback is highly appreciated. --But if there is any questions, pls feel free to contact us. Pls do not leave a neutral or negative feedback without communicating.Thank you for your understanding and cooperation. Enjoy your shopping please!