1. Small and Portable: Mini speaker, convenient to carry whether at home or while traveling. You can place it in your car, suitcase, or bag, making it suitable for indoor and outdoor parties, family gatherings, singing, and more. 2. Long Battery Life: This karaoke speaker features a builtin rechargeable 1500mAh lithiumion battery, providing up to 5 hours of continuous music playback. The microphone includes an efficient 300mAh rechargeable lithiumion battery, allowing you to sing your favorite songs anytime, anywhere. 3. HD Stereo Sound Quality: Equipped with a voice frequency driver and advanced digital signal processor, it delivers clear sound with moderate volume and no noise. Simply press and hold the volume button during playback to easily adjust to your desired level. 4. Fun Voice Change: The karaoke machine offers 6 sound effects—standard, KTV, female, male, doll voice, and more—with onekey switching to meet various needs and add extra fun. for outdoor family gatherings, classrooms, speeches, and many other occasions.