The Direct Sound Serenity Plus+ Travel Headphones are premium-grade over-ear headphones with a closed-back design delivering exceptional audio quality. The Serenity Plus Headphones are ideal for music lovers on the move providing passive noise cancellation and high-quality audio. The headphones are great for use with MP3 players smartphones and tablets with its wide frequency range design to deliver high-resolution sound. The noise-cancelling design requires no batteries eliminating the need for extra baggage fees. They are also foldable for easy transport and features a universal padded fully-adjustable headband for optimal comfort. Ideal For Travelling The Direct Sound Serenity Plus+ Travel Headphones are designed for the music lover on the move featuring a passive noise cancellation and premium-grade drivers. Conventional noise cancelling headphones usually require batteries to operate which can result in extra baggage charges. The Serenity Plus Headphones still retain the same features as other Direct Sound headphones providing 33.4dB of passive noise cancellation and premium-grade drivers. The headphones are ideal for use with personal MP3 players smartphones and tablets. High-Resolution Audio Quality At the heart of the headphones are premium-grade headphones drivers delivering a wide frequency response designed to deliver extreme accuracy and clarity. This makes the headphones ideal for musicians causal listeners and audiophiles. The noise-cancellation technology also helps to eliminate outside noise allowing you to hear every nuance of your music. The eco-friendly passive noise cancellation technology helps to improve overall audio performance whilst retaining the natural sound of your music. Designed For Comfort The lightweight yet robust construction is designed to minimise listening fatigue along with the padded earcups. This provides superior comfort allowing you to listen to music for longer periods without the headphones becoming uncomfortable. It also features a universal padded and fully adjustable headband providing a perfect fit for any head size. The headphones are also foldable for easy storage and transporting. Additionally the headphones come complete with a premium-grade 36-inch extension with patented 90 degree 3.5mm stereo plug. Features Luxury over-ear travel headphones with closed-back design Ideal for music lovers on the move Noise-cancellation requires no batteries – eliminating baggage fees Premium-grade 40mm drivers Delivers high-resolution audio quality 33.4dB of passive noise cancellation Foldable for easy transport Universal padded fully adjustable headband Red is Right E-Z channel identifier Stylish and sleek design Specifications Compatibility: All personal MP3 players smart phones and tablets – Android or iOS Passive Noise Cancellation: 33.4 dB Frequency Response: 20-20000 Hz Cord: Premium detachable Weight: 8.5 oz Manufacturer Warranty: One year