Portable, 2.0 Bluetooth stereo speaker rapidly pairs with any Bluetooth device and provides clear and full-range sound. With the use of Bass ReNu, the passive membrane design, BT-X3 Universal Bluetooth Speaker produces the complete range of quality audio enhanced by a rich and deep bass sound without the use of a woofer. You may play wirelessly with the Bluetooth wireless technology or connect with a 3.5mm audio connection. The compact speaker system, with its universal audio input, can be used with any tablet, MP3, smartphone, laptop and more. One-watt-per-channel speaker offers pre-amplified and magnetically shielded, membrane frequency response of 120 Hz - 20 KHz as well as 2 x 1-full range NDFEB drivers, LED power indicator and LED Bluetooth indicator. Function keys include power switch, volume controls, pairing/play/pause, and previous/next.