In-Earphone 100% Guarantee Original and Brand QKZ DM10 New Headset Earphones for Smartphone. Quality optimization of an exclusive patent, metal composite vibrating membrane. The ergonomic design, nipple grade silicone ear muffs. Ear and tail pipe connection with oblique angle design, comfortable and easy to wear. It has high-quality sound, enjoy your life. A perfect gift for yourself or friend.

• Material: Metal CNC Zinc alloy
• Speaker: 12mm NdFeB speaker
• Speaker Power: Rated input power: 3mW, Maximum input power: 5mW
• Impedance: 16Ω±15%
• Speaker Sensitivity: 100±3dB (at 1KHz 1mW)
• Speaker Frequency Response: 20-20K Hz
• Microphone Sensitivity: -42dB±3dB1kHz, 3V 0dB=1V/pa
• Operation Temperature: -10 Celsius --- +40 Celsi