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Pro Crisp treble and solid bass
Klipsch S4 earphones have excellent response at both the high and low ends of the audible spectrum, providing clean and undistorted sound.
Pro Built for outdoor and sports use
Klipsch S4i Rugged earphones are designed to withstand extreme conditions in both activity and environment.
Pro Numerous controls accessed with 3 buttons
The S4i's buttons recognize combination presses, tap patterns and held buttons, allowing access to many features: call answering, voice control, song titles, etc. These controls are intended for use with iPhones.
Pro Clear call quality
The built in mic provides a good experience when talking on the phone.
Pro Very secure fit
These headphones come with four different sets of silicone plug tips, allowing a snug fit for nearly any size or shape of ear.
Con Controls are designed for Apple products
The built in controls are only guaranteed to work with iPhone 3GS and onward. (The Klipsch S4a, designed for Android devices, does not have a rugged version.)