QuietOn 4 is a unique earplug that combines active and passive noise cancellation and reduces disturbing noises at night such as the snoring of partners, traffic noise and neighbour parties. The active noise cancellation effectively combats noise across the entire frequency spectrum, but especially attenuates low-frequency noise that ordinary earplugs cannot reduce. High-quality Comply tips provide excellent comfort, a perfect fit and passive noise isolation for restful sleep. There is no masking sound, no Bluetooth and no electromagnetic radiation. Due to their exceptionally small size and design that mimics the natural shape of the ear, the QuietOn 4 are also suitable for side sleepers. The QuietOn 4 earplugs are easy to use. Take the earplugs out of the charging case and place them in your ears; there are no buttons on the earplugs and no separate set-up is required. Thanks to the QuietOn earplugs, you can sleep better, but they are also ideal for ensuring quiet journeys. The battery life is approximately 28 hours on a single charge and the case provides three additional full charges.