The Oku-07 Premium Mono Headset Is A Comfortable, Single-Ear Headset Designed For Clear Calls And Multimedia Enjoyment. It Features A High-Quality Microphone For Crisp Voice Capture And A Noise-Canceling Function To Minimize Background Distractions. With Its Single-Ear Design, You Can Stay Aware Of Your Surroundings While On A Call. Product Specifications: Connectivity: Wired (Lightning) Speaker Size: 40Mm Frequency Response: 20Hz-20Khz Microphone Sensitivity: -42Db ± 3Db Impedance: 32Ω Cable Length: 1.2M