Features:Portable and easy to operateFull-color OLED displayAdvanced measuring technology provides steady and accurate ECG waveformsAnalysis and report 17 types of suggestive resultsPC data management software for data transmission and analysisChest lead & limb lead measure available.Specification:Technical SpecificationsDisplay Mode: Color LCD displayResolution: 240*160Screen Size (mm): 40*57.6Signal Input: Single embedded metal electrodes or external lead wireLead Selections & Measuring Modes: Quick measurement by embedded electordes;Measurement by external electordes with lead wires (single channel for Lead I II or III)ECG Bandwidth: 0.05-40Hz (Enhanced mode), 0.5-40HZ(Normal mode)Internal Noise Level: 30uVp-pHeart Rate Range: 30-240bpmHeart Rate Accuracy 2bpm or 2%which ever is greaterDisplay Scale: 5mm/mV 10%CMRR 60dBWave Form Sweeping Speed: 20mm/s10%Measurement Time: 30 seconds per testSuggestive Results: 17 types of waveformDimensionsmm: L125*W70*H21.5Net Weight(without Batteries) : 106gPower Supply: 2*AA batteries(not include)Voltage: DC 5.0V/1.0APacking List:1 x Machine main unit(without battery)1 x Velcro storage pouch1 x English user's manual1 x Data cable1 x Data Manager software CD