Product Specification: Dimension : 32 x 28 x 65 mm Frequency : 0.05-150Hz 50/60Hz Sensitivity : >100dB Speed : Paper Speed: 5 mm/s, 10 mm/s, 25 mm/s, 50 mm/s Brand Name : Comen Pkg Qty : 1 Item Weight : 3kg (with battery) Size : Peter record: 80 x 20 mm Number Of Items : 1 Resistance : 50M? Channel : 3 Channels Noise Level : 15uVp-P Display Text : LCD Model Text : CM 300 Current : Input Circuit: 0.05mA Voltage Rating : 100V-150V AC/ 220V-240V Filter Type : EMG Filter: 25Hz/35Hz/45Hz/OFF DFT Filter: 0.05/0.1/0.2/0.5Hz Lowpass Filter: 150Hz/100Hz/70Hz AC Filter: 50Hz/60Hz/OFF Display Resolution : 320 x 240 pixels Mode : Recording Mode: (Auto: 3CH, 3CH 1R, 1CH,1CH 1R Manual: 3CH, 1CH Rhythm: Single rhythm lead)