*Specification of Product Product Model Number:QTEJ02JY Type of headphones: In-ear Product Weight: 17g Wired control: Available Colors: Silver Cable Length: 1.25m Jack Type: 3.5mm Gold Plated Rated Power: 5mW Speaker Impedance: 32Ω Sensitivity: 98dB Frequency Response: 20-40,000Hz *Features of Product New Pro version of November of 2016,hybrid triple drivers technology.Dual dynamic and balanced armature units to bring you a richer music xperience. Pass more than 700 items high-standard quality inspections. Acoustic tuning by four-time Grammy award winning tuner,Luca Bignardi, to perform a subjective acoustic tuning for Mi In-Ear headphones Pro. He believes a good set of headphones is one designed for the majority and bases his tuning on this belief so everyone can come to truly appreciate music. Composite graphene diaphragm with the sandwich design which extend High-frequency performance better,bring rich music experience,more penetrating power,clear and natural sound. Wire Functions: For Android Phones: compatible with most Android phones, support play, answer, volume control functions. For i/OS Phones: compatible with i/OS phones ,support play, answer, switch songs functions,DO NOT support volume control. *Package Include: a set of Mi In-Ear headphones Pro 3 extra sets of ear buds Plastic collection box a fabric bag Instruction Manual.