iASUS XSound 2.1 Helmet Speakers Introduce high definition audio to just about any helmet with ear pockets. Designed for iASUS Concepts headsets. Also compatible with iPhone and Android phones with 3.5mm jack. Rich, full-range audio with tuned 40mm drivers. Measures 1.8" (4.6cm) in diameter and 0.6" (1.8cm) thin with velcro installed. **Please confirm the compatibility and measurements of the XSound 2.1 below with your helmet ear pockets before ordering.** Cable lengths tailored for iASUS throat mics. (LEFT speaker: 40cm (15.8") RIGHT: 20cm (7.9"), with 100cm (40") extension cable with gold plated connectors. Tool-less installation with velcro mount kit and foam speaker covers.