Description: 【Plug and Play】: This smart wireless door bell is ready to use right out of the box. It features four adjustable volume levels, ensuring its bell can be heard even in complex house layouts. 【Energy Efficient】: The door bell main unit uses intelligent power management technology for low power consumption, allowing it to be plugged in for long term use without concerns. 【Product Specifications】: Made from electronic components, this product has a compact design with dimensions of 7.46cmx4.7cm/2.94inchx1.85inch and receiver dimensions of 10.27cmx5.17cm/4.04inchx2.04inch. 【Easy Installation】: The multifunctional door bell is a compact and portable receiver, easy to operate, and the door bell can be plugged in for use. 【25 Melodies】: The wireless door bell offers 25 melodies for your choice. choose the appropriate volume according to your family’s needs. very suitable for the elderly or kids. Size Chart: launcher: 7.46cmx4.7cm/2.94inchx1.85inch receiver: 10.27cmx5.17cm/4.04inchx2.04inch Package Includes:1 Launcher 1 Receiver Note: Please allow slightly errors due to manual measurement and different monitors.