Product Description:
1: Firmware upgrade
2: small size
3: Self-strap PWM signal
4: Easy to carry
5: One-button reset button This FNIRSI 138PRO portable oscilloscope is small, and this oscilloscope is only 65 * 60 * 18mm, which is more suitable for carrying it with traditional oscilloscope. If you're looking for new oscilloscopes, try this product, it won't let you down.

Features:
Portable oscilloscope: This oscilloscope is smaller than the traditional oscilloscope and is more suitable for carrying it.
One-button automatic adjustment: One button automatically sets all parameters and fast waveform measurements. Long press the auto button quickly calibrate the baseline.
Three trigger modes: Test a single trigger mode of a non-periodic signal, the automatic trigger mode of the test cycle analog signal and normal trigger mode for testing digital logic signals.
PWM square wave output: This oscilloscope has a PWM square wave output function with a frequency range of 0-80 kHz, a duty cycle of 0-100%.
Application is widely used: This oscilloscope is suitable for automotive maintenance, DIY, home appliance repair, experimental teaching, etc. 

Parameter:
Sample rate: 2.5ms / s
Bandwidth: 200khz
voltage range:
X1: ± 40V (VPP: 80V)
X10: ± 400V (VPP: 800V) (Type3 & 4 only)
Trigger mode: single, automatic, normal
Coupling mode: AC / DC
PWM output: 3.3V
Display: 2.4" ,320*240
Frequency: 0-80khz
Duty cycle: 0-100%
Packing size: 65 * 60 * 18mm / 2.6 * 2.4 * 0.8in