138Pro Digital Oscilloscope Kit with 2.4" LCD Display 200Khz Digital Mini Oscilloscope Portable 2.5Ms/s Sampling Rate, Built-in 1250mah Battery, Pocket Oscilloscopes with X1/X10 Probe

Beffkkip BISS Basic Electronics bench & test gear

1 HN user recommended this in 2025, in one comment.

20072026

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What HN users said

ericol 2025-02-16 linked amazon.com View on HN

in Flea-Scope: $18 Source Available USB Oscilloscope, Logic Analyzer and More [pdf], 4 replies deep

Note: the intention of this comment is just to be informative.

I did a quick search in my country's Mercado Libre (the local Amazon, we could say) and the cheapest available one, Fnirsi-138 Pro [1] goes for a price of aprox. 50 USD [2]

[1] https://www.amazon.com/Digital-Oscilloscope-Portable-Samplin...

https://www.mercadolibre.com.ar/osciloscopio-digital-fnirsi-...

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amazon.com 1 HN link, in catalog

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Product facts

Brand	Beffkkip
Product type	Lab supply
On Amazon since	2023-03-13

What Amazon says

【One-Key AUTO & Perfect Trigger Mode】Equipped with efficient one-key automatic function, the measured waveform can be displayed without complicated adjustment. All parameters can be set automatically with one key to quickly measure the waveform. Press and hold the AUTO key to quickly calibrate the baseline. It has full trigger function. Automatic trigger: test cycle analog signal. Single trigger: test sudden aperiodic signal. Normal trigger: test digital logic signal.
【Compact and Portable & Firmware Upgrade】FNIRSI 138 PRO is an upgraded mini digital handheld oscilloscope with high cost performance. Smaller size, stronger function, upgraded one-key calibration function, improved test parameters, and supported the interface to directly update firmware. It can measure voltage up to ± 400V.
【Built-in Battery & Universal BNC Interface】Built-in 1250mah high-quality lithium battery, which can be used continuously for about 5 hours when fully charged. Type-C supports data transmission and charging.
【High-precision Real-time Display & HD LCD Screen】The real-time sampling rate of the oscilloscope is 2.5MS/s and the bandwidth is 200KHz. With PWM square wave output, frequency range: amplitude 3.3V. Square wave 0-80khz. The duty cycle is 0-100%. The display is equipped with a 2.4 inch HD LCD screen, the resolution is 320 * 240.
【Widely Use】FNIRSI-138 PRO is a practical and cost-effective MINI handheld oscilloscope, mainly for the maintenance industry and R&D education industry. It is widely used in many fields, such as auto repair, DIY, home appliance repair, measuring electricity, experimental teaching, etc.

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138Pro Digital Oscilloscope Kit with 2.4" LCD Display 200Khz Digital Mini Oscilloscope Portable 2.5Ms/s Sampling Rate, Built-in 1250mah Battery, Pocket Oscilloscopes with X1/X10 Probe

When HN users recommended it

What HN users said