Enable speakers or other hi fi devices to receive audio signals wirelessly via bluetooth the bluetooth receiver plugs into any stereo 3 5mm audio in socket aux ideal for use with bluetooth a2dp enabled car speakeripodiphonemp3 playertvhifi system or other bluetooth devices this bluetooth adaptor draws power from its built in li on battery and when fully charged will allow for 10 5 hours continuous use device still works when charging the adaptor comes complete with a charging cabl