Features:Bluetooth headset for listening to music. Talking on the phone whileexercising. Or activities The back can be a magnet ear neck tostreamline the activities - Mic Sensitivity: -41 ± 1dB - FrequencyRange: 20-20,000Hz - Sensitivity (SPL): 92 ± 3dB - Impedance: 16 Ohm± 10% -. rated Input Power: 10 mW - Distortion: ≤1% - CordLength: 75mm - Standby: 160 hours - Talk time: 5-8 hours - Musicplayback time: 4-6 hours - time in the charts: 2. Hour
High quality microphones with noise cancellation technology which can cuts out most of the ambient noise,making higher quality and clearer telephone calls3.Frequency Range:20Hz-16Hz4.Sensitivity:100dB5.