Single channel / color & touch screen 2.8 inch colorful 320x240 resolution tft touch screen. Touch keyboard (patient name, age, sex,?¦) Automatic and manual operations. Power supply: ac220v 10% dc 8.4 lithium battery. Ac, emg filters. Interpretation Exterior sd card, upgrade the storage to 1000 case. Usb interface Paper speed: Auto record: 6.25mm/s12.5mm/s25mm/s50mm/s, error: ,±5% Manual record: 6.25mm/s12.5mm/s25mm/s50mm/s, error: ,±5% Record 450 exam of ecg and review the stored cases and patient information anytime. Measurement parameters: hr, p-r interval, p duration, qrs duration, t duration, q-t interval, q-tc, p axis, qrs axis, t axis, r(v5), s(v1), r(v5)+s(v1). Sensitivity selections: 2.5, 5, 10, 20 mm/mv, 5 options , error:,±5%. Standard sensitivity is 10mm/mv,±0.2mm/mv . Comes with pc software for data transfer(save , review, print a report ) - reanalyze and ,??12 leads ecg - analysis items of ,??fcg,?�, ,??hfcg,?�, ,??qtd,?� and ,??hrv,?�, Multi languages