This FNIRSI 138pro portable oscilloscope with small size, the size of this oscilloscope only 65*60*18mm, compared with traditional oscilloscopes, it is more suitable for carrying around. If you are looking for a new oscilloscope, come and try this product, it will not let you down.Features:Portable Oscilloscope: Compared with traditional oscilloscopes,this oscilloscope with smaller size and more suitable for carrying around.One Button Auto Adjust: One button AUTO setting all parameters and quick waveform measurement. Long press AUTO button to quick calibration baseline.3 Trigger Modes: The singles trigger mode for tests unexpected non-periodic signals, the automatic trigger modes for test period analogs signals and normal trigger is for tests digital logic signals.PWM Square Waves Output: This oscilloscope with the PWM square waves output function, 0-80kHz frequency ranges and 0-100% duty cycle.Wide Applications: This oscilloscope is suitable for car repairing, DIY, home appliance maintenance, experiment teaching, etc.Specifications:Material: PCBType:(optional)Type1: without P6100, without batteryType2: without P6100, with batteryType3: with P6100, without batteryType4: with P6100, with batteryBattery: 1 * lithium battery, 1250mAh (only type2&4 included)Sampling rate: 2.5MS/sbandwidth: 200KHzVoltage ranges:X1: 40V(Vpp:80V)X10: 400V(Vpp:800V) (only type3&4)Trigger modes: Single, Automatic, NormalCoupled mode: AC/Direct currentPWM output: 3.3VFrequency: 0-80kHzDuty cycle: 0-100%Package size: 65 * 60 * 18mm / 2.6 * 2.4 * 0.8inPackage weight:Type1&3: 162g / 5.7ounceType2&4: 182g / 6.4ouncePacking list: (Optional)Type1&2:1 * OscilloscopeorType3&4:1 * Oscilloscope1 * P6100