... .4" TFT, 320 mobile ecg instructionsIt is a kind of multi-functional mini patient monitor. It integrates the functions of auscultation,ECG ... 7 hours when the power is full.Safety Type: Internally powered equipment, B Typemobile ecg accessoriesAn User ManualAn earphone, it is ... ~230Hz,Lung:100~800Hz,H&L:20~800Hz hand held multi-functional patient monitor ecg machine