Apply to any smart phone and mp3/mp4 Full frequency range design;90 degree retation folding of the audio plug.Crescent shape.

Apply to any smart phone and mp3/mp4

Full frequency range design

90 degree  retation folding of the audio plug.Crescent shape.it contains a 800mA lithium battery(keep 9 hours)

very convenience for diver to use;Has hands-free function.

mini fm transmitter for cellphone