Intelect Legend XT System 4 Channel Combination Group Activity Units 4 above，iOS 9 HERH6036TW 4 above，iOS 9 Model: U80EH EN001 4 Channel Combination * Easy to add modularity allows the addition of two additional channels of electrotherapy light therapy or a battery module * High contrast 5 (13 cm) FSTN LCD monochromatic user interface * Two independent electrotherapy channels expandable to four independent channels * Multiple waveform electrotherapy six clinical waveforms: Interferential Premodulated High Volt Russian Symmetrical Biphasic and Microcurrent * Documentation of treatment data with Patient Data Cards * User defined protocols for your specific needs * Dual frequency ultrasound at 1 or 3 3 MHz * Pulsed or continous duty cycles (10% 20% 50% & 100%) * 4 Ergonomically designed soundhead applicator sizes: 1 cm2 2 cm2 5 cm2 & 10 cm2 * Watertight soundheads for use in underwater therapy * Optional Operator Remotes allow treatment stop start and pause as well as change in amplitude at any time during a treatment session * Each remote is color coded for designation between channels *