... iPhoneNumber:BW0221024Features:1.For iphone earphone with on/off switch and mic2.Color Metal with microphone In-ear Headphone for iPhone in ... mm 13.Cord length: 1.35m14.Speaker Sensitive: 116dB/mW15.Microphone Sensitive: 58dB16.Frequency: 8-20000Hz17.Impedance: 32Ω18.Plug ... products, varieties, good quality.For example,Bluetooth earphone,Wireless headphone,Earphone for Ipod,Earphone for Iphone 3G...