For Straight Talk Samsung S738C Galaxy Centura / S950C Galaxy S / S959g (Galaxy SII) / Galaxy Proclaim / Galaxy Precedent / T528G / S380C Ear-Hook Design Hands Free Headset Earphone W/ Microphone Ear-Hook Design allow headset to stay at all time while engaging in various activities such as driving, typing, jogging, and etc.. Enjoy freedom in using your phone with this handsfree earpiece. Equipped with an on/off mic allowing you to talk freely with this headset. This super lightweight mono handsfree headset features great sound quality. Adjustable 3.5mm Headset; Can be used with either years.