Black Mini Sports Headphone Headset MP3 Player Support Micro SD TF + FM Radio
USB cable is about 65CM longLCD display: screen about 24 x 13 mm. When it connects the computer, it shows PC, when connected to 3.5 mm, it shows LINE IN, and FM for FM function.Adjustable headset size.Signal-to-noise ratio: 70dB;Output power: 2X10MW.Frequency response: 20Hz-20KHz;Supports music file formats: MP3Support audio sample rate :8-48kHz (MP3 bit rate :8-448kbs, WMA bit rate :32-384kbs)Support System: Windows98/2000/XP/WIN7USB interface: High-speed USB 2.0; MP3 headphones to charge and transfer files (turned)With player / FM toggle key (short press to pause / play, press and hold to switch between MP3 and FM mode), previous / next song (short press), Volume Up / down key (long press)Memory capacity: without memory card, but with TF card slot, maximum support 16GBSupport music format files: MP3Charging power supply: computer USB port 5V DCBattery: 3.7V DC 890 mah, rechargeable lithium-ion polymer batteryContinuous working time: approximately 6 hours1 x MP3 player1 x Data cable1 x Battery1 x Audio cablePackaged in carton box