... . USB/SD/FM C. wireless microphone battery speaker with wheels 1. Power (RMS): 40W2. Impedance: 4Ω3. Speaker units: 10" + ... . FM radio, 20 memory stations5. USB/SD supported6. Wireless microphone7. with wheels, portable8. Built-in battery (12V7AH and 12V12AH for you to ... , supermaket, karaoke, etc.Good quality at competitive price battery speaker with wheels