Feature: 1. Oscilloscope + multimeter + signal source waveform generator, multifunction in one, suitable for outdoor use. 2. The oscilloscope has a bandwidth of 70MHz, a sampling rate of 250MS/s, a storage depth of 8K and a waveform refreshing rate of up to 10000 wfrms/s, and supports automatic measurement. 3. 4 1/2 digit multimeter, support standard voltage, current, resistance, capacitance, diode, continuity test. 4. The signal source adopts 25MHz output frequency, 125MS/s sampling rate, 14bits vertical resolution, supports 1MΩ and 50Ω output. 5. Standard USB TYPE‑C interface, support power bank charging and host computer communication, 3.5‑inch LCD display. Specification: Item Type: Handheld Oscilloscope Material: ABS Color: As shown in the picture Oscilloscope Performance Parameters: Model HDS272S Bandwidth 70MHz Channel Dual channel + single channel signal source Real-time sampling rate 250MSa/s (single channel),125MSa/s (dual channel) Sampling mode Normal,peak sampling Storage depth 8K Display 3.5in LCD Waveform refreshing rate 10000 wfrms/s Input coupling DC,AC,grounding Input resistance 1MΩ±2%,in parallel with 16pF±10pF Probe attenuation coefficient 1X,10X,100X,1000X Maximum input voltage 400V (DC+AC peak value, 1MΩ input impedance) (10:1 probe attenuation) Bandwidth limit 20MHz Time base range 5ns/div~500s/div, step by 1~2~5 system Vertical sensitivity 10mV/div~10V/div Vertical resolution 8bit Low frequency response (-3db) ≤10Hz at BNC Rise time (typical on BNC) ≤5ns Trigger type Edge trigger Trigger method Automatic, normal, single Trigger level ±4 divisions from the center of the display Automatic measurement Frequency, period, amplitude, maximum, minimum, average, peak-to-peak Cursor measurement Voltage difference between cursors (△V), time difference between cursors (△T) Communication Interface USB TYPE-C Power supply Polymer 18650x2 4400mAh (built-in battery) Multimeter Performance Parameters: Digital display 4½ (Maximum display 20000) Measuring Voltage, current, resistance, capacitance, diode, on-off Input resistance 10MΩ Diode 0-2V Function name Range Accuracy DC Voltage 200.00mV ±(0.5%+5 dig) 2.0000V/20.000V/200.00V ±(0.3%+3 dig) 1000.0V ±(0.5%+2 dig) AC Voltage 200.00mV/2.0000V/20.000V/200.00V ±(0.8%+5dig) 750.00V ±(1%+5dig) DC Current 20.000mA/200.00mA ±(1%+5dig) 10.000A ±(2.5%+2dig) AC Current 20.000mA/200.00mA ±(1%+5dig) 10.000A ±(2.8%+5dig) Resistance (Ω) 200.00Ω/2.0000kΩ/20.000kΩ/200.00kΩ/2.0000MΩ ±(0.8%+3dig) 20.000MΩ ±(1%+3dig) 100.00MΩ ±(3%+3dig) Capacitance (F) 20.000nF/200.00nF/2.0000μF/20.000μF/200.00μF/2.0000mF ±(3.0%+10dig) Frequency response(Hz) (40 - 1000) Hz Signal Source Performance Parameters: Waveform output frequency Sine wave 0.1Hz~25MHz Square wave 0.1Hz~5MHz Sawtooth wave 0.1Hz~1MHz Arbitrary wave 0.1Hz~5MHz Sampling rate 125MS/s Channel 1 Output amplitude 20mVpp-5Vpp (high resistance), 10mVpp-2.5Vpp (50Ω) Wave length 8K Vertical resolution 14bits Output impedance 50Ω .How to Use 1: Get the product, press and hold the power button for 2 seconds to turn it on. 2: Connect the probe to the oscilloscope. 3: First adjust some parameters of the oscilloscope (accurately adjust according to the measuring object). 4: Measurement. Package List: 1 x Handheld Oscilloscope2 x BNC to Alligator Clip1 x USB TYPE-C Cable2 x Test Leads1 x Probe Pen1 x Bag1 x Calibration Pen4 x Plastic Rings1 x Plastic Cover1 x Hollow Iron Needle1 x Instruction Manual