Dynavox Premium Speaker Cable 4 x 2.5 mm2 For High Resolution. Inner conductor OFC (oxygen-free copper (99.99%), twin, construction each 2 strands per pole +/-. Conductor design each measures 50 x 0.25 mm, cable diameter: Approx. 12 mm, wire cross section 2.5 mm, nylon outer braid Black/Red design to provide full protection against mechanical stress. Low-loss polyethylene insulation with additional PE SUPPORT piece. High-quality Banana Plugs for firm support and the best possible transmission. Length: 2 x 2 m.