Main features: 1. 30W power output,cover 1500m2 2. 7.4V 4000mAh lithium battery 3. Support Multiple devices connected in series 4. Bluetooth 4.2 sync,UHF wireless karaoke Sync 5. DSP sound with effective layering 6. Support TF card &USB flash drive 7. SHIDU patented appearance; 8. Stylish, ergonomic and comfortable design; 9. Two speakers, 5.25 inch one for bass; 1.5inch for treble 10.Number keys help choosing songs quickly
