A. 2.0 speakers with FM/USB/SD B. LED color light C. perfect for stage, karaoke, party, etc. 2.0 speakers with FM/USB/SD1. Power (RMS): 55W*22. Impedance: 4Ω3. Speaker units: 10" + 4"×2 4. Digital FM, 20 memory stations 5. USB/SD 6. protection circuit7. LED color light8. dimensions: 32.5×28×61.8cm ×2