• Product: 3.5mm male to USB 2.0 male charging cable. Length: 1m • Universal compatibility: Supports charging portable electronic devices through 3.5mm ports, such as: MP3 players, pocket recorders/speakers, Bluetooth headphones, iPod shuffles, etc. Not compatible with smartphones. • Use it anywhere: Charge your electronic device through the USB port of your PC, USB wall charger, USB travel charger, and USB car charger, you can use it anywhere. • Compact and convenient: This 3.5mm charging cable is an essential accessory for your small electronic devices, you don't need more cables. • Note: This cable is not an audio cable, it cannot transmit sound. It only works with devices with a 3.5mm charging port, not with an auxiliary port.