Coby Electronics Corporation is a manufacturer of quality consumer electronics products designed to deliver outstanding performance for value conscious consumers who do not compromise on product performance. Coby incorporates new designs with innovative technologies to produce great looking and great performing consumer electronics products.PRODUCT FEATURES:Full-closed type Professional series;2.4 GHz wireless technology;High performance 50mm neodymium drivers for Deep Bass Response;Large soft-cushioned comfortable ear pads for maximum comfort;Built-in recharging circuit for Ni-Cad batteries (batteries included).