Fm radio card wireless headphone with exotic art work 1.Support computer system:  windows98, win2000, win xp, win vista 2.Usb interface: high speed USB 2.0 3.Support memory card: TF Card 4.Capacity of support card: 16gb. 5.Support music format: mp3, wma.. 6.Battery: chargeable lithium-ion polymer battery (3.7v/320ma/h). 7.Charger power: computer USB interface 5v or dc 5v.. 8.Successive working time: about 10 hours 9.Frequency response: 20h 20khz. 10.S/n ratio:  -82db. Two part:...Speaker parameter: Speaker diameter:40mm.. Impedance: 32 S.P.L: 108db s.P.L.At 1khz.. Rated power:20mw . Aggregate capability:40mw .. Frequency response:20hz-20, 000hz. Blister and papercard