We tested wireless and wired headsets in independent batches, using the exact methodology for the two groups: We analyzed each headset for a minimum of one whole workday, taking a person- to two-hour breaks in between stints. On the subsequent days, we swapped in between headsets for the facet-by-side comparison. https://allhealthmarket.com/product/smart-wearables/smart-electronics-smart-wearables/headphones/b19-wireless-headphones-with-fm-radio-bluetooth-headset-stereo-microphone-2/