Color Dark red + Black Built-in Memory No Quantity 1 Piece Material ABS Screen Type Others Touch Screen No Memory Card Type TF Card Max Extended Capacity 4GB Audio MP3WMA Video No E-book NO Headphone Jack 3.5mm Battery Capacity 500 mAh Working Time 4 Hour Battery Type Li-ion battery Loud Speaker Function No Lyrics Display No Other Features Convenient sports design comfortable to wear; OS supported: Windows 98 / 2000 / XP; High speed USB 2.0 interface; Frequency response: 20Hz~20kHz; SNR: >85dB; Working temperature: 0'C~45'C Packing List 1 x MP3 player headphones