Fangrui Product Details Professional Audio Quality: Experience Studio-level Sound With This Portable Karaoke Machine-microphone Combo That Delivers Crystal-clear Audio Performance, For Ktv Singing, Parties, And More. Stable Bluetooth-compatible 5.0: Boasting An Advanced Bluetooth-compatible 5.0 Connection With 15m, This Karaoke Machine Toy With A Wireless Microphone Ensures A Stable Link To All Compatible Devices Without The Worry Of Sudden Interruptions. 66mm Large-diameter Full-range Dual Speakers,the Low Frequency Is Powerful And Deep, And The Mid-high Frequency Is Clear, Giving You A Better Listening Experience. 5200mah Large Capacity, Reverse Charging,built-in 5200mah Large-capacity Battery, Bringing Strong Endurance, Even Outdoor Travel Can Accompany You For A Long Time. Rgb Lighting Effects,the Colors Move With The Music Like The Aurora, Creating A Rhythmic Atmosphere. Playback Type:bluetooth-compatible Connection Bluetooth-compatible Version: V5.0 Effective Distance: 15 Meters Frequency Response Range: 134hz-20