If your exercise is anything more vigorous than walking, you probably have a hard time finding a pair of great sounding earphones that will stay in place in your ears. Well look no further than these In-Ear Sports Headphones from Monoprice!These earphones feature a flexible clip on each earbud, which wraps over your ear like a pair of glasses, keeping the earbud firmly in place inside your ear. Additionally, these earphones feature a 45" cable, which is long enough to reach your phone in your pocket, without having too much excess cable.Sonically, these earphones feature a 9mm driver, which produces a 20Hz to 16KHz frequency response range and 100db Sound Pressure Level. The earphones are rated for maximum input of 10mW power.