Featuresr bt42 version is compatible with all bt enabled devicesr support aux in ios power display and tf card reader data accessr maximum output power 10wr built in 1700mah lithium ion battery offers up to 10 hours of playtimer support bt hands free bi direcional conversationr compatible with apeflacmpswmawav audio formatsr tronsmart element t1 wireless smart speaker is a compact speaker filled with innovative technology that is designed to make your life easier