The following OEM and aftermarket products are compatible with the AT-2 from Schiller. The Schiller AT-2 Plus Unit carries an alphanumeric keyboard and a 6/12 channel representation of all 12 simultaneously acquired leads. The AT-2 carries a large, high resolution backlit monitor for easy reviewing of information. MME will continue to support the lifespan of your unit with quality accessories as well as premium preventive maintenance services through ReNew Biomedical. For more about servicing your devices, Contact ReNew Biomedical here . Please note that different configurations of units may make them incompatible with certain accessories. If you should have any questions, please contact your MME customer representative or get in contact with one here: 866-468-9558