Sy-510mv computer headset with microphone. All color English blister packaging, lengthening and coarse wiring, metal microphone, high sensitivity, high quality speakers, sound quality, long-term mass production processing. We have them in stock at any time. Js-510mv computer headset with microphone, 60 PCS/piece. Suitable for personal computers, Internet cafes and other audio-visual devices, with good sound quality, QQ,MSN, put anager and Skype are the best chat tools. Foreign businessmen are welcome to purchase in large quantities, ready to stock. We can make personalized packaging according to customers' requirements. Volume: 67 x58x78, article 60 / a resistance: 32 ohm (1 KHZ) sensitivity: 102 db s. p. L at 1 KHZ maximum input power: 300 mw frequency response range: 20 Hz - 25000 Hz wire length: about 2 ~ 3 m microphones: 9.7 mm - 58 X6.7 db + 2 db connection plug: 3.5 mm JOHNYSTAR welcome you!