【Charge and Data Transfer 2 in 1】This USB 2.0 male to 3.5mm audio jack cable allows you to safely power, charge your device and synchronize and download files at the same time. Note: It is not audio cable, can't transmit sound. | 【Convenience】Easily charge portable devices through the PC USB port, portable power bank, USB car charger, etc. Quick synchronizing or loading or file at rate up to 480 Mbps. | 【Compatibility】Support to charge portable electronic devices with 3.5mm port(round port), such as: MP3 Players, pocket recorders/speakers, Bluetooth headphones, iPod shuffle etc. Not compatible with smartphones. | 【Perfect Accessory】Essential accessory for your small electronic devices. Cable 3.3FT long, flexible to use and easy to store. | 【Excellent Customer Service】We offer 24 months of customer service. Please feel free to contact us if you have any concerns. We are committed to providing the best service.