1HD Stereo Sound Quality: Equipped with voice frequency driver and advanced digital signal processor, clear sound, moderate volume, no noise. Hold down the volume button while playing music, easily adjust your desired volume. 2Small and Portable: Mini speaker, convenient to carry, whether at home or travel, you can put it in the car, suitcase or bag, suitable for indoor and outdoor parties, family gathering singing, etc. 3Multiple Functions: The Karaoke machine transmits wirelessly via the latest built in Bluetooth 0 chip, ensuring instant pairing, providing more stable transfers and longer distances. The portable karaoke machine also supports small memory cards, USB connectivity, and can even be used as a rechargeable battery to charge phones and microphones. It is suitable for your smart device, TV, Pad, tablet and PC. 4Fun Voice Change: Bluetooth karaoke machine with 6 kinds of sound effects, standard, KTV, female, male, doll voice, multiple voice change, one key switch, can meet more needs, bring more fun. Very suitable for family outdoor party, classroom, speech and many other occasions. 5Long Battery Life: This karaoke speaker has a high 1500mAh rechargeable lithium ion battery built in, which can play music for 5 hours continuously, and the microphone has an efficient 300mAh rechargeable lithium ion battery built in. You can sing any song you want no matter where you are.