... Frequency: 20-20,000HZ3. Sensitivity: 90dB4. Impedance: 16Ω5. Cord length: 1.2m6. Max power input: 10mW7. ... .Type: lateral, in the ear, closed, daynamic9. Plug: silver-plated, straight, stereo plug10. With built-in ... can receive the goods within 3-5 days or 5-7 days when we delivery the goodsWarranty6 ... daysUPS: about 3-7 working daysEMS: about 5-20 working daysOur factory Test machine Test Package ...