Portable Stereo Digital Speaker w/USB & Built-In Rechargeable Battery - Plays From SD/MMC Cards! Portable Stereo Digital Speaker General Features: Black color LED Indicator light On/Off Switch Built-in rechargeable Li-ion Battery USB powered Output Power: 3W (RMS) Rating: DC 5V Two (2) Fold Out Feet for stability Plays SD/MMC Cards Ports: 3.5 mm Audio IN DC 5.0V IN Slot USB SD/MMC Unit Dimensions: 2.75 x 8.61 x 2.40-inches (H x W x D, approximate) Regulatory Approvals: