Overview: Many cell phones do not use a standard headset jack and you are forced to use their original earphones. This adaptor enables your headset to use a standard earphone jack to get full stereo sound form. It"s perfect for listening to MP3s with your own earphones, speakers etc. Item Description Features: ●100% BRAND NEW! ●Convert the 2.5mm (2 rings) earphone jack to 3.5mm earphone jack. Note: 1. If the item can"t work because of incompatibility, welcome to contact us for fully refund; 2. Please check your original headphone whether it is 2 rings or 3 rings on the 2.5mm end. If it is 2 rings you can bid this item.