Specification: Brand Name: KZ Model Number: RX Type: In-ear Microphone: NO Wired Control: No Cable Length: 1.2m Frequancy: 8-25kHz Net Weight: 13g Sensitivity: 108dB Rated Power: 50mW Impedance: 16Ω Optional Color: Black, White, Blue. Package Included: 1 X KZ RX Earphone