This item is provided by Crutchfield.com and includes free phone technical support for the life of the product. Details on how to take advantage of this service will be included with your package. Should you have any issues locating information on how to contact Crutchfield Technical Support, please contact this website's Customer Service department. Add a ring to your doorbell This add-on chime is an ultra-easy way to add a traditional ring to your eufy Video Doorbell E340 (sold separately). Just plug it into a regular AC outlet, then connect it to your doorbell in the eufy Security app. You can then adjust with the volume and select one of eight chime tones. This chime can be placed nearly anywhere in your house to make sure you're aware whenever someone is at your door. That way you don't miss a visitor because your app alerts are going to your phone in another room. You can also expand your doorbell's storage remotely with the chime's microSD slot (card not included, sold separately). What's in the Box: 1. Plug-in doorbell chime 2. U.S. 2-prong plug adapter 3. Quick Start Guide