The Monolith™ M350 In-Ear Planar Headphones are the perfect way to experience your music collection. Featuring a newly designed 31mm planar driver, the M350 produces a detailed aural landscape and resolves all the sonic detail from the best recordings. The spectacular imaging, low distortion, and perfectly balanced sound make the Monolith M350 a true audiophile listening experience. Monolith™ and the Monolith logo are trademarks of Monoprice Inc.Updated Jan 11, 2021