Cellet Universal 3.5mm Boom Mic Headset Headphone For Samsung Captivate i897 Special detachable ear loop rotates 360 degrees to fit either left or right ear. Built-in On/Off switch that will function on phones that support this feature. Patent protected Clear Sound technology provides high quality audio even under windy outdoor conditions and traffic noise. Gold plated 3.5mm mini jack for best possible connection, Flexible boom microphone allows easy adjustment. Universal compatibility: works with 3.5mm mini jack phones.