POWERFUL BLUETOOTH SPEAKER IN CLASSIC ROUND DESIGN EASILY CONNECTS TO YOUR DEVICE WITH BLUETOOTH 3.0 TECHNOLOGY INCLUDES MANUAL AND CHARGING CABLE SPECS: BLUETOOTH VERSION: 3.0+EDR, OUTPUT POWER:3W, WORKING RANGE: 10M, BUILT-IN BATTERY: 500MAH, PLAY TIME 4 HOURS, FREQUENCY RESPONSE: 100HZ-18KHZ, SIGNAL&NOISE RATIO: =85DB, USB/TF CARD SLOT,3.5MM AUX IN. COMPLIES WITH CE, FCC, ROHS. 2" H X 2 1/4" W