★★★ Please be sure to read my profile. I've written "How to Request a Price Reduction" there. ※As of October 26, 2025, there is an issue where the content of price reduction requests is not displayed on my screen. Please wait for a while until it is restored (I have contacted the administration). ★★★ A smart doorbell made by AOSU. You can build a wireless doorbell (intercom) just by connecting to Wi-Fi. The set is divided into a doorbell unit (outdoor) and a home base unit (indoor). It has a built-in battery (5200mAh), but an external power supply can also be connected. It also has built-in storage, so no external memory (such as a card) is required. Use it by downloading the dedicated app. You will receive a notification when a visitor rings the doorbell, but you will also receive a notification just when someone passes in front of the camera (such as a mail carrier), so it can also be used as a security camera. I was using it until I removed it, and it is in perfect working order. Also, I used it in a recessed entrance with a roof, so the product has hardly been affected by wind and rain. It is in very clean condition. The mounting bracket, USB charging cable (new), doorbell removal pin, and instruction manual are included. By the way, what is "not" included are the quick start guide, mounting screws, and mounting guide sheet. I have been using it for about 2 years. Thank you. #★Thank you.