This is a microphone-shaped voice training device that allows you to relieve stress and burn calories while singing. ◾️It helps with voice training and burns calories through singing. You can expect to burn approximately 7.59 kilocalories per song. I received it as a gift and have only used it once. The top of the box is missing. The instruction manual has creases. It has been disinfected with alcohol. We are looking forward to your purchase if you understand.