Low-cost, portable, 3-lead device. Product details: Display 320x240 dot single color LCD Screen Mains supply: rated input voltage = 100V~115V/220V~240V; rated frequency = 50Hz; rated input power = 35VA Built-in lithium battery pack Recording: recorder – thermal dot-matrix printer record paper: folded thermosensitive paper 80mm width; rolled thermosensitive paper 80mm width Effective width: 72mm Paper speed: 10mm/s, 25mm/s, 50mm/s (±3%) ECG Unit: leads - 12 standards leads Acquisition mode: simultaneously 12 leads A/D resolution: 12 bits Time constant: ?3.2s Frequency response: 0.05Hz ~ 150Hz Sensitivity: 5, 10, 20 (mm/mV) Input impendance: ?50M? Filter: AC Filter: On/Off DFT filter: 0.05/0.10/0.20/0.50 EMG filter: 25Hz/35Hz/OFF LOWPASS filter: 150Hz/90Hz/70Hz CMRR: >100dB Dimensions: 320mmx275mmx66mm Gross weight: about 2 kg