Incredible sound quality from a small package. At 2.5 inches tall, you'll be amazed at the sound. Super easy to pair. Works wirelessly up to 30-feet away. Stop hassling with wires and cords. Works with all Bluetooth-enabled devices: smart phones, tablets and most notebooks. Line-in port for connecting non-Bluetooth devices. Lithium-ion rechargeable battery for up to 4 hours of wireless play - no need to buy batteries.