MP3 Earphone, Handsfree Earphone New product: In-ear earphone with high quality sound and fashionable design MP3 Earphone, Handsfree Earphone.Speaker size: 9.8mmFrequency range: 20-20,000 HzSensitivity: 116+/-3db(at 1 KHz,0.5V rms)Impedance: 32 OhmsCable length: 120cmJack: 3.5mm stereo New Product: Earphone