CEStore&reg; Portable Bluetooth 4.0 Music Transmitter Featuring APT-X Supports Two Multi Connection idea Transfer Audio from MP3 Home Speaker to any Bluetooth Receiver Speaker Headphone Wireless Devices Works with any playback device that has a standard headphone jack (1/8" or 3.5mm) Listen to music on any Bluetooth compatible headphone, hearing aid, speaker or more Using the latest technology of Bluetooth 4.0 and APT-X codec that offers crystal clear sound and offers no noticeable delay or lag Operating times - Up to 5 hours playback using internal Lithium-Ion battery or continuous with USB Support Multi Connection - can link with 2 bluetooth devices at the same time