MINI BLOCK BLUETOOTH LI-ION BATTERY SPEAKER. PLAY YOUR FAVORITE TUNES THROUGH THE ROOM WITH THESE MINI BLOCK SPEAKERS. EASY TO CONNECT TO MOST DEVICES. CONNECT THROUGH BLUETOOTH OR USB/AUDIO CABLE. INCLUDES USB CABLE AND AUDIO CABLE. GREAT FOR YOUR HOME, OFFICE OR OUTDOOR ACTIVITIES. RECHARGEABLE 300 MAH BATTERY. CHARGING VOLTAGE: DC5V. SPEAKER OUTPUT POWER: 3W, FREQUENCY: 200 HZ-20 KHZ. 2" W X 2" H