Product Features: Brand: Just CallModel Number: EX900Type: In earBuilt-in Microphone: YesColor: BrownConnectivity: WiredNoise Canceling: YesSound Isolating: YesCompatible with: AllItem includes: 4 pieces ear budsHi-Fi Sound effect: YesFrequency Response: 20-20000HzSensitivity: 95dB /- ...