... Sport MP3 Bluetooth Headset B-014 1,Bluetooth+MP3 2,Memory 1GB-4GB 3,Sport design,fashion,super light Sport Bluetooth ... Bluetooth Headset B-0141,Bluetooth+MP32,Memory 1GB-4GB3,Sport design,fashion,super light FeaturesBuilt-in 3.7V 150mah rechargeable lithium batteryUSB ... ,WV,RM,OGG,APE,AAC,CD,WAV,FLAC music formatBuilt-in flash memory up to 4GBOperate Systerm: Windows 98/2000/XPFrequency Response ...