Experience audio perfection on the go with the Sennheiser Momentum 4 in-ear noise cancelling truly wireless headphones. Featuring a TrueResponse transducer system, it delivers high-end sound with impactful bass and refined treble response. A long battery life of up to 7.5 hours, extendable to 30 hours with the charging case, allows for uninterrupted listening. | Sennheiser Momentum 4 In-Ear Noise Cancelling Truly Wireless Headphones - Denim