OneSonic BXS-HD1 True Wireless Stereo EarphonesOneSonic BXS HD1 True Wireless Stereo Earphones High Definition Audio with superior bass Ergonomic design optimised for active wear True Wireless Stereo The ONESONIC BXS HD1 True Wireless Stereo Earphones integrate 13mm high performance speaker drivers with the Airoha 1536U digital signal processor to give excellent sound quality including deep bass with clear mid and high frequency sound. Featuring an optimised ergonomic design with a lower ear lobe