SingingMachine SMK445 is a portable karaoke system that allows you to sing along to your favorite songs wirelessly via Bluetooth. It features a built-in microphone with adjustable volume and echo effect, as well as colorful LED lights that change with the music. The system has an output power of 2.5 Watts (RMS) and a working distance of up to 10 meters in open space. It comes with a USB charging cable and has a battery life of up to 4 hours. The SingingMachine SMK445 is perfect for karaoke parties, sing-alongs, and other musical activities.