Are you looking for a high-quality wireless headset to enjoy wonderful music during sport? We are proud to introduce professional and high-quality wireless sporty back-headphone to you. The headphone is characterized by its exquisite design, light material. It will be your best companion during sports and offers you wonderful music. And, it supports playing music of the TF card. Moreover, the silicone ear cushion can greatly insulate the sounds around you, so you can hear your favorite music clearly.  "Specifications:  USB: Micro USB 2.0 Speaker: 2 * 10MW Support MP3 / WMA formats Supports TF card up to 16G Output Frequency: 20Hz-20kHz Music Playing Time: About 8 hours Charging: Use mini USB port (5V) to recharge it for 2~3 hours Operating system: Windows 98 / 2000 / XP / WIN 7 / Linux9; Mac os10. Signal –to-Noise: > 80dB Working Temperature:-10~45 Celsius Color: Black / White / Blue / Pink / Green (Optional) Main Item Size: app.15cm * 13.0 * 5.0 cm / 5.90 * 5.11 * 1.97in  Main Item Weight: 28g / 1.0oz Package Size: 19.5 * 16.5 * 6.0 / 7.67 * 6.49 * 2.36in Package weight: 67/ 2.36oz Package list:  1 * Sport Wireless TF FM Radio Headset 1 * USB Cable (Cable length: 51cm)