Audio Pro Addon T14 Bluetooth Wireless Stereo Bookshelf Speakers - Pair - High Fidelity - White High performance stereo audio Digital Class D amplifier, 2 x 50W,  textile dome tweeter, 4.5 woofer Inputs: Bluetooth standard V4.0 with apt-X codec, Aux In 3.5mm stereo, 2 x TOSLink optical Outputs: USB for charging devices (DC OUT/max 5V 1000mA), RCA Sub Out Dimensions: 220 x 150 x 195 mm