Features: Memory Capacity 2GB/4/8GB Support Audio Format MP3 , WMA , WMV , WAV Data Transfer Connection Type USB 2.0 Compatible Operating Systems Windows Vista/XP Style: Hands free In-Ear,Closed, dynamic,CCAW Drive units Battery & Power Battery Type Built-in Rechargeable Lithium-Ion Battery Work Time 5-8 hours Audio Properties SNR 85db Net Weight 0.13Kg
