Dynavox premium speaker cable 4 x 2.5 mm² for highest resolution. Inner conductor OFC (99.99% copper), twin construction with 2 cores per pole +/-. Conductor construction 50 x 0.25 mm each, cable diameter approx. 12 mm, core cross-section 2.5 mm², nylon outer braiding black / red for protection against mechanical stress. Low-loss PE insulation with additional PE support element. High-quality banana plugs for firm hold and best transmission.