Enjoy Bluetooth® connectivity, great sound, and the ability to charge your phone with this Bluetooth Stereo Speaker from Monoprice. This stereo Bluetooth speaker features a 5 watt/channel (RMS) amplifier driving a pair of 2" neodymium speakers. It has enhanced bass output, digital volume control, and a 50Hz - 20kHz frequency response. The Bluetooth v4.0 module supports the A2DP, AVRCP, HFP, and HSP profiles and a range of up to 30 feet. Equipped with a microphone, it is capable of serving as a hands-free communication device. It includes a 3.5mm audio input jack on the back and a 3.5mm stereo patch cord, so you can make a direct connection when Bluetooth is impossible or impractical. It also features a USB A female charging port on the back, with a nominal output of 5 VDC, 1 amp, making it capable of charging most phones and other USB powered devices. An AC power adapter is included. The speaker measures about 11.8" x 3.1" x 3.2".