AVA400 Open-back headphones with self-adjusting headband support mechanism - suitable for hours of use with home audio and video systems. Listen for a full, high-quality sound. Open-Air design, featuring 40mm CCAW drivers, delivers rich, detailed sound. Honeycomb-punched aluminium housings enable clear sound reproduction. Open-air design, featuring 40mm ccaw drivers, delivers rich, detailed sound. Honeycomb-punched aluminium housings enables clear sound reproduction. 3m cord length. 3.0m single sided cord. Adjustable headband. 3.5mm jack with 6.3mm adaptor. 40mm driver. (not included). Manufacturers 2 year guarantee.