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Compact digital multimeter in leather case with test leads

aFe Power Digital Multimeter AI-4201

SKU CH-1H9R-6FBDZ

Pocket multimeter measures AC and DC voltage to 450 V, resistance to 40 MΩ, with continuity buzzer, diode test, auto-ranging and a 4000-count LCD

  • Team affiliation1 Piece
  • Key featuresBeep, Battery Powered, false
  • Product weight0.24 lb (0.11 kg)
  • Measures AC and DC voltage up to 450 V for versatile low-voltage work
  • Audible continuity buzzer speeds testing in dim conditions
  • Auto power-off after 15 minutes extends battery life
  • 4000-count LCD gives clear readings for DIY and professional use
  • Weighs .24 pounds and fits in a pocket with protective leather case

Pocket auto-ranging DMM for low-voltage work

The aFe Power AI-4201 is a pocket-sized digital multimeter with auto-ranging and a 4000-count LCD. It measures AC and DC voltage from 1 mV to 450 V and resistance from 100 mΩ to 40 MΩ. The tool is intended for DIYers, mechanics and hobbyists working on low-voltage circuits.

Measurement ceiling at 450 volts AC or DC

The meter’s voltage range tops out at 450 V, so it cannot be used on mains panels, industrial three-phase supplies or high-voltage automotive systems. Resistance measurement stops at 40 MΩ, limiting its usefulness for insulation testing. Continuity and diode checks are available, but there is no current, capacitance or frequency function.

Leather case and auto power-off extend field life

A leather protective case holds the meter and test leads, and the unit fits in a jeans pocket for everyday carry. The display shows a low-battery indicator, and the meter shuts off automatically after 15 minutes of inactivity to preserve the battery. Buyers needing current measurement, higher voltage ratings or bench-top durability should look elsewhere.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 56% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameaFe Power
Size & build
Product weight0.24 lb (0.11 kg)
More details
Team affiliation1 Piece

Questions about this item

Should I pick the 4000-count version or a lower-count model for automotive wiring?

The 4000-count LCD resolves readings to 1 mV on the 4 V range, so small voltage drops across connectors become visible.

What does the 450 V rating mean when I am testing a 12 V car circuit?

The meter accepts up to 450 V AC or DC, so 12 V systems are well within range and the 1 mV resolution lets you spot millivolt-level drops.

How does the auto-ranging feature affect the measurements I can trust?

Auto-ranging selects the correct scale automatically up to 40 MΩ resistance and 450 V, and the display updates to 4000 counts for each range.

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