Karaoke microphone with Bluetooth connectivity, LED illumination, and echo adjustment. - Bluetooth Function: Karaoke microphone with Bluetooth connectivity - LED Illumination: Equipped with LED lights for visual effects - Echo Adjustment Function: Adjustable echo strength - Built-in Speaker: Speaker built into the main unit - Sound Quality Adjustment Function: Function to adjust sound quality - Portable Design: Convenient portable design Thank you for viewing. I opened the box once, so it's listed as "Like New." The outer box is torn due to poor opening, but there are no issues with the product.