FOUR LISTENING MODES, HIGH VERSATILITY— 1. Wireless CD-Quality Bluetooth® with aptX, 2. Amplified Mode (Wired), 3. Passive Wired, 4. Phone Control.30 HOURS WIRELESS PLAYBACK—RECHARGABLE INTERNAL BATTERY+ AAA POWER*— The ONLY headphone to include an internal rechargeable battery and replaceable AAA battery backup, so you can instantly get back to wireless listening.CD-QUALITY SOUND OVER WIRELESS WITH BLUETOOTH 4.0 & aptX—The newest Bluetooth 4.0 technology delivers wireless audio with “wired” quality. BUILT-IN PHONE CONTROL & AMPLIFIER— Make, answer & control calls seamlessly with a single knob. Turn on the amplifier for studio-tuned dynamics and volume.TOP-QUALITY ACCESSORIES - Professional-quality, gold plated 4ft (1.2m) braided cable, with in-line call and playback control buttons. Standard USB-to-Micro USB charging cable. Gold-Plated UNIVERSAL 1/8”(3.5mm) to 1/4”(6.5mm) Adapter. Taking a plane trip? We’ve even included a gold plated 2-Pronged flight adapter. All of which fit perfectly alongside your Stance S1 in a high-quality carrying case.LOW PRICE, HIGH VALUE — You’d expect to pay far more for all these features and value! Plus 40mm drivers, ForgettableFit comfort, 1-year warranty, AND a very satisfying price.SERIOUS STYLE - This isn’t a regular headphone experience. It’s Pendulumic. So it looks as good as it sounds. With a Steam-Punk style that says futuristic in a novel way. High-end, solid switches and controls, including an easy-access “analog” knob that feels great and controls many functions.