1.retro handset with bluetooth 2.anti radiation handset .HD speaker handset 4.answer/end button handset 5.CE&FCC&ROHS ... -20,000Hz 9. Sensitivity: -80dB±3% 10. Impedance: 32 ohms11. Speaker diameter: 30mm12. USB Charger: 5.2V 500mA 13. Dimension:21 ... , Western Union), 30% deposit, balance before shipment.RemarkMade in China wireless bluetooth headphone,bluetooth handset