1.  retro handset with 3m cable   and  3.5mm jack 

 2. can use for many mobile phones with 3.5 mm jack  , but volume buttom    competible   for iphone 4  & 4S  

3. color  available  : pink , red , white  , black ,  purple 

4. QC passed , full test before shipping 

5. OEM is highly appreciated  , 1000pcs per color