ROMOSS Senyeek Hi-Fi Music In-ear Earphones Dual Loudspeaker Super Bass with Mic Volume Control Main Features:- Senyeek Hi-Fi earphones adopts semi-in-ear structure, no pressure to ear, feel comfortable after long time wearing.- Use Hi-Fi acoustic structure to build a high quality sound.- Adopt double loudspeaker for every cavity, a woofer and a tweeter. Both work in coordination but noninterference, brings a wider range.- Super bass. Built-in bassoon in the back sound cavity, enhance the low frequency. Performs a rich sound.- With a silver-plated wire. Lower impedance than other copper oxide wire, reduce the attenuation of signal.- Drive-by-wire is compatible with both iOS and Android system with a button to switch.- Interface and line tighten together by fastening from both side with long lifespan. Model: SenyeekColor: WhiteWearing type: In-EarFunction: Answering Phone,MicrophoneCertificate: CE,FCC,RoHsConnectivity : WiredApplication: Computer,Mobile phone,Portable Media PlayerPlug Type: 3.5mmCable Length (m): 1.2mFrequency response: 20-20000HzImpedance: 14ohmsSensitivity: 103dB Package weight: 0.096 kgPackage size (L x W x H): 2.00 x 8.00 x 8.00 cm / 0.79 x 3.15 x 3.15 inchesPackage Contents: 1 x Earphones, 1 x Storage Bag, 2 x Earbud Tips ( Large ), 2 x Earbud Tips ( Small )