New 3.5mm Subwoofer headset Earphone Super Clear Bass Metal Headphone Noise isolating Earbud for Cellphone MP3 MP4 Broadcast frequency width: 5 ~ 30000 Hz£¬40 ¦¸ impedance:hifiMaximum input: 3500 mWOutput the sound pressure level: 107 db/mW3.5 mm3P mini plug plug: phi (gold-plated、 screw-type)Weight: 270 g (excluding wire)Connecting wires、 Lch unilateral wire reel is about 1.2 m