Support all kinds of smart phones. Portable Size with PA System: Portable Karaoke machine with Bluetooth and wireless microphone has beautiful small shape 6.3" and light weight. Singing machine karaoke is equipped with full range high volume high fidelity speakers, with deep bass, sweet midrange, accurate treble, and perfect display of music melody. A built-in 8d DSP noise reduction system and 4-layer filter head can effectively reduce the noise generated by singing, always letting you sing songs to maintain perfect clarity. 【 Multifunctional Speaker】: This portable speaker with microphone supports Micro SD/TF card, USB, AUX-in, after connecting with mobile phone, computer, TV, it can be used as a speaker alone. It can also be used as a microphone system during meetings or outdoor events, it is so small and portable, but the volume is amazing. Built-in the Bluetooth 5.0 wireless chip, compatible with 99% of Bluetooth-enabled devices.USB port can be used as an emergency power bank to charge your phone. 【Make the Sound Interesting】:Duet mode double fun Bluetooth karaoke wireless machine with 2 microphones which has seven kinds of magic voice effects: original, monster, baby, female, male, 2mixing, it can meet more needs and bring more fun to use。The voice changer microphone is suitable for in-car karaoke, home, party, classroom, speeches, and many other occasions. 【LONG BATTERY LIFE】: This karaoke speaker has a built-in 3000 mAh rechargeable lithium battery for 8-10 hours of continuous playback at 50% volume, and two wireless microphones have a built-in 1200 mAh rechargeable lithium battery. A charging cable is included, the speaker can act as a charging station, and the USB port can activate the power bank function to charge your phone. Bluetooth version: 5.0. Playing time: about 5 hours. Charging time: about 1.5 hours. Transmission distance: greater than or equal to 10 meters. Frequency range: 20Hz-20KHz.