Easy and direct operation Portable 12ck Accurate pace pulse identification and automatic analysis function Four working modes: Manual / Auto / Physical Examination / Storage 12 leads simultaneous waveforms display 800 x 480 graphic 7 inch color screen with Alphabet keyboard for input (only for 12-CK) 800 x 480 graphic 10 inch color touch screen (only for 12-CT) 215mm 12 channel format recording Built-in USB. RS232 interface ECGNET software optional Adapt to 110-230V 50/60Hz AC power supply Advanced [Freeze] function Built-in rechargeable Li-ion battery 250 patients information storage (Extendable) USB interface allows net transmission USB flash disk and USB printer connected High accuracy thermal printing Adapt to 215mm roll paper and 210x140mm Z-fold paper. Technical Specification: Lead Standard 12 leads lead acquisition 12bit/1000Hz (synchronously 12 leads) Work mode Manual / Auto / Physical Examination / Storage Filter AC Filter :50Hz/60Hz EMG Filter: 25Hz / 45Hz Anti-Drift Filter: 0.15Hz (Adaptive) CMMR ≥100dB (with AC Filter) Input circuit Floating; Protection circuit against Defibrillator effect Input impedance ≥50M Input circuit current ≤0.05µA Patient current leakage ≤10µA Calibrating voltage 1 mV±2% Voltage tolerance ≥±500mV Time constant ≥3.2s Frequency response 0.05~160Hz (-3db) Noise level < 15µVp-p Inter-channel interference ≤0.5mm Sensitivity Auto, 2.5, 5, 10, 20, 40mm/mV Recording mode. 3ch, 6ch, 6ch, 12ch Default Man. Mode is 3ch format Default Auto.Mode is 12ch format Paper speed 6.25, 12.5, 25, 50mm/s (±3%) Paper 215mm x 20m roll paper or 210mm x 140mm Z-fold paper Communication RS232 / USB port Power supply AC 110-230V (±10%), 50/60HZ (±1 Hz), 60VA DC Built-in rechargeable battery, 14.4V (4400mmAh) Dimension / Weight 347mm x 293mm x 83mm / 4.8Kg (ECG-3312B) 347mm x 293mm x 83mm / 5.8Kg (ECG-3312G) 12ck All specifications are subject to change without prior notice.