The Garret MS3 Headphones with Z-LINK Wireless Technology using WT-1 Wireless Transmitter provides a high-quality signal, faster than blue tooth. The headphones are comfortable even after hours of wearing, volume is adjustable. Charging is easy with the supplied USB leads the charge lasts me for many outings depending on use. Condition is excellent, they have been well looked after, cleaned after each use. Instruction booklets for each and still kept in their original box.