Apple 2GB, iPod shuffle. Player media type: flash-media, Total storage capacity: 2 GB. Audio formats supported: AAC, AIFF, MP3, WAV. Headphone connectivity: 3.5 mm, Headphone frequency: 20 - 20000 Hz. Frequency response: 20 - 20000 Hz, Impedance: 32 Ом. Interface: USB 2.0, Microphone connectivity: 3.5 mm