MODERN WIRELESS DOORBELL SYSTEM-TERAOL

Based on the image, you have a Teraol Wireless Doorbell Kit. This is a plug-and-play system designed for easy installation without the need for complex wiring.
​Here is a quick breakdown of the components and how to get it running:
​## What’s in the Box?
​The Receiver (Large Unit): This is the part that stays inside. It usually plugs directly into a standard wall outlet. It features a speaker and often has buttons on the side to change the melody or adjust the volume.
​The Transmitter/Push Button (Small Unit): This goes outside by your door. It’s battery-operated and sends a wireless signal to the receiver when pressed.
​Accessories: You have an alkaline battery (likely a 23A 12V or CR2032) for the push button, mounting screws, and an adhesive pad for a "drill-free" installation