With 2 microphones for singing along with your favorite artists. 3.5 mm AUX-in input. Supports USB for audio input and TF card. Transform your voice for hours of fun. Press the control button on the microphone to switch between 2 voices: high voice or low voice. Headphone jack. Extremely convenient: a handle for easy carrying - wherever you want to go. Requires 4 x LR14/C batteries. Available in assorted colors (microphone colors in yellow or red).