Sony MDR-RF925RK Wireless RF Stereo Headphones (Certified Refurbished) This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com RF transmission allows you to listen to your audio source from up to 150' away Auto-tuning feature scans and selects the best available channel for clear transmission Transmitter also acts as an induction charger with no connection pins to worry about Comfortable, stylish design with adjustable, padded headband and cushioned earcups