Miniature, lightweight transmitter plugs directly into guitar, bass (even portable keyboard) output jack; No cord connection needed * 16 user-selectable UHF frequencies for interference-free operation * Unprecedented wireless portability with single AA battery-powered receiver * ASC (Auto-Sync Channel) infrared wireless download pairs transmitter to selected receiver frequency for quick, easy setup * MT-16R with 90° angled 1/4" plug for surface mounted jacks only