using any portable sound player:an mp3 player,a dictaphone,etc size:5X7X10mm
shape:anatomical shape
Battery Life:15h
Interference:<2%
Receiver type:magnetic/analogue
Maximmum volume:110db
Battery:sony sr416sw/337
Package Size:35.0*50.0*45.0(cm)
Approved:CE/FCC
After sales service:1 year warranty
Specification:
Mini Eaephone Wireless Hidden Cell Phone Earpiece
Compatibility:The earphone,together with the inductive loop work with mobile telephones,
radiotelephones,to enable two-way communication.they may also be used to play the sound
Mini Eaephone Wireless Hidden Cell Phone Earpiece
Be used play the sound using any portable sound player