• Metal HIFI earphone, portable and comfortable to wear.
• 3D surround sound effect and high-quality super bass design.
• Smart wire control, built-in microphone, song switch for music play.
• Noise-isolating in-ear design reduces ambient noise.
• Compatible with Smartphones, Computers, MP3, MP4 and other device with 3.5mm AUX Interface.

 Type: Piston In-Ear HeadphonesTechnical Specification1. Material: Metal CNC Zinc alloy2. Weight: 15g3. Speaker: 9.2 mm NdFeB speaker4. Speaker Power: Rated input power: 3mW, Maximum input power: 5mW5. Impedance: 32Ω±15%6. Speaker Sensitivity: 99±3dB (at 1KHz 1mW)7. Speaker Frequency Response: 20-22K Hz8. Microphone Sensitivity: -42dB±3dB1kHz, 3V 0dB=1V/pa9. Operation Temperature: -10 Celsius --- +40 CelsiusFunction: Play / Pause, Answer / Off, Noise Cancelling, Microphone