Perfect Replacement: Our Mechanical Wired Doorbell Can Be Used In Conjunction With Most Doorbell Switches, It Is Very Suitable To Replace Your Old Doorbell.<br>Easy To Install: The Doorbell Is Screwed In, Install And Use Without Complicated Tools, Saving Money Time And Effort, The Product Is Small And Does Not Occupy Space. Can Be Cleaned With A Dry Towel.<br>Ac Powered: The Household Wired Doorbell Is Powered By Ac Power. After Installation, You Don'T Need To Replace The Battery Or Charge It. It Is Once And For All, Easy To Use And Convenient.<br>High Quality: Ding Dong Home Doorbell Adopts High Quality Abs Flame Retardant Shell, Resistance To Oxidation, Impact And Corrosion, Durable Appearance , Simple And Elegant.<br>High Power Speaker: This High-Quality Wired Doorbell Uses High-Power Speakers, With Loud Sound And Strong Penetration, Which Can Penetrate Any Room To Remind You And Others. To Your Family That The Practicability Is Very Good.<br>Note: <br>1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. <br>2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!<br>About Shipping: <br>1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly.<br>2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.<br>3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping!