Our stereo speaker for under the pillow has been the internet best-selling pillow speaker since 2001. It works conneting it with its 3.5 mm jack to popular players (smart phones, computers, radio, etc.). Pllowsonic delivers quality sound at nitimate volume levels. so that it can surround you with soft sound emerging from within your pillow, or caress your senses with just a touch of sound that only you can hear, without bodering anyone else near you.