We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.
Thinksound Ts01 Sport
The in-ear Thinksound Ts01 Sport headphones employ clip-on attachments and utilize a sweat-resistant architecture for the outdoorsy and/or athletically inclined user. Additional device features include a 4-foot cable, and a 20 – 20,000 Hz frequency response range.
Frequency Response Range
20 – 20,000 Hz