Specifications 1. Clear Voice, Noise Reduction2. Low Radiation, support USB charger3. LED light, answering/hanging up button4. Compatible with all mobile phones5. Receiver and microphone function6. Control Volume of mobile phones with Side Button.7. Browse phonebook and use other functions while calling8. Impedance: 32 ohms                 9. Sensitivity: -80dB±3%        10. Frequency response: 20Hz-20,000Hz11. Speaker diameter: 30mm12. USB Charger: 5.2V 500mA                         13. Dimension:21*6*6.7CM14. N.W.:300g                                                  15. Material: Plastic, or Plastic with Rubber paint, or Plastic with color oil and PU.16. Certification: RoHS,CE,FCC

telephone receiver