4-Channel Electrotherapy is treat 2 patients at the same time. And has independent therapies. Key Functions Therapeutic Encyclopaedia: Therapeutic encyclopaedia with pre set protocols based on years of medical research. Connection: Connection with other BTL products. Channel Electrotherapy: 4 channel electrotherapy with touch screen for easy and comfortable operation. Broad Touch Screen: Broad touch screen display. Programmed: Pre programmed protocols. User defined: User defined protocols. Therapeutic Encyclopaedia: Therapeutic encyclopaedia Built in patient database. Unique Modular System : Unique Modular System ™ option of later unit upgrades. Identification Additions: Identification of additions and additions maintenance check. Test Quality Electrodes: Test of quality of electrodes and patient cables. Possible Connection: Possible connection with BTL Vac option. Ultrasound Connection: Possible connection with BTL 4000/BTL 5000 ultrasound therapy units option. Colour Frame: Colour frame option. Connection : PC for SW upgrades Multilingual: Multilingual unit.