inputs.text: great purpose - jog keep heart healthy tried ear phones tended conceal environment ie approaching vehicles use sandick clip player little speaker plugs right clip unit player attached speaker collar tshirt rides perfectly volume fine hear cadence use go djsteveboy bunch cadence downloads seach amazon \\run marines\\ hear cars approaching sounds speaker highfi stereo aint perfect drill instructor havent vagues idea needs keychain since leave plugged clip outstanding device purpose took long time find im ordering second one backup