1Break the USB sound card K song machine can only be used on the computer, support computer / for Android box phone / tablet / TV. 2With wireless microphone technology, built-in rechargeable lithium battery. 3Support reverb adjustment, background music and microphone volume are adjusted separately. 4Support reverb adjustment, background music and microphone volume are adjusted separately. 5Metal mesh protection net, anti-drop, no deformation. Features: 1. Break the USB sound card K song machine can only be used on the computer, support computer / for Android box phone / tablet / TV. 2. With wireless microphone technology, built-in rechargeable lithium battery. 3. Support reverb adjustment, background music and microphone volume are adjusted separately. 4. Convenient and simple LINE port, support most device background sound input. 5. Metal mesh protection net, anti-drop, no deformation. Specification: Power: DC5V Microphone: Wireless Emissivity: 16DB Effective distance: 30 meters Pickup: low noise dynamic microphone core Frequency response: 50HZ-17kHZ Distortion: 100DB Evaluation rate: 230M-270M Microphone battery capacity: 420mA Microphone continuous working time: 6H Size: 10.1 x 10.5 x 2 cm / 3.9 x 4.1 x 0.8in Weoght: approx. 667g Package list: 2 x Microphones 1 x Karaoke Machine 1 x Manual 5 x Cables