Features. Volume control. Multimedia function. Built-in microphone. Rubberized -finish. Wirelessly streams music from all Blue tooth-enabled devices. USB rechargeable lithium-ion Battery. Connect smart phones tablets computers and mp3 players. Dual mode option-Bluetooth or Line-in with built in 3.5 mm. Cable. Cable management. Rubber wrist bandSpecifications. Bluetooth v4.0. Built-in Auxiliary cable. Multimedia function. Volume - adjustment button. Lithium-Ion battery. 5 Hours Play Time. Color - Blue. Dimension - 3.25 x 2 x 3.25 in.