Features: Simplyplugthe3.5mmjackplugintoaportablemusicplayer foriPodCDplayerpopthecassetteintothecarradiocassette andplaymusicthroughyourcarstereo NearCDquality CarcassettedecksthathavesidetapeopeningandANYMP3player/foriPod/foriPhone/MobilePhonethathasthenormal3.5mmaudioheadphonejack. Note:Whenuseitpleasecontrolthevolumeunder30%-40%otherwisemaytakesomenoise. Compatiblewithcarcassettedecksthathavesidetapeopening Self-adjustingspringheadandsilentmechanism Mini-jackpluginsertsintoMP3player/foriPodorCDplayer\'sheadphonejack Compactandportable Specifications: Originalbox:NO Color:Black Netweight:34g Packageweight:43g Packingcontent: 1xBlackcassetteadapter