Features: MULTIPLE SOUND EFFECTS AND SCENE MODES: The sound card support various scene modes and multiple sound effects, can change your voice like that of child, male, female, etc., and adding more fun to the sound. LARGE BATTERY: Built-in 1200mAh large rechargeable battery, powering your entertainment time durably, avoiding frequent charging, eliminate your low battery anxiety. HIGH COMPATIBILITY: Universal USB interface for charging and for connecting to the computer, standard 3.5mm plugs for stable audio signal input and output. Compatible with mainstream phone and computer. WIRELESS CONNECTION: Wired and wireless connection are both available. Wired connection for smooth signal transmission and BT wireless connection for convenience. EASY OPERATION: Every single button is with clear markup for indicating particular function. Visual light indicator for showing working status. Adjusting knobs can satisfy fine-tuning.