does it check house current?

This is for DC current tests only which uses batteries such as boats , riding mowers and automobiles. It will do both 12 and 24 volt systems. Does not work with AC voltage or current in homes

Can you check for voltage by just holding the probe against a wire or do you have to pierce the insulation on the wire?

You have to pierce the wire. I suggest if you do, dab a bit of silicone sealant to the hole to keep out moisture and avoid corrosion. I would also suggest getting the back probe set to avoid piercing wires if that is a concern.

Does the colour of the tool refer to any differences?

The picture is the real color, and the product is taken in kind

Does this come with extension cable?

If you are working on trailers or the like you will need to purchase the extension. However the cord it comes with should be long (20FT) enough to work on any part of a car or light truck that you need to access.

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Power Circuit Probe Kit, Breaker Finder for Automotive Circuit Tester, P200

Product ID: 384373620

Details

Brand
TopDiag
Colour
black red
Item Weight
1200 Grams
Power Source
Battery
Style
Digital

⚡9-30V wide voltage range

📊320x240 DPI TFT color display

🔋18A max continuous current

Description

🚗 Power Your Precision: The Ultimate Circuit Tester for the Modern Mechanic

COMPLETE KIT FOR ON THE GO PROS - Includes 6m test line, copper probes, relay connectors, and toolbox for ultimate convenience.
CUSTOMIZABLE DISPLAY ONLINE UPGRADES - Stay ahead with optional screen styles and seamless firmware updates.
PRO GRADE OSCILLOSCOPE MULTIMETER COMBO - Visualize and measure voltage, resistance, current, frequency with precision.
ALL IN ONE AUTOMOTIVE DIAGNOSTIC POWERHOUSE - From relay to injector tests, get every circuit insight in one sleek kit.
SMART SAFETY WITH ADJUSTABLE CIRCUIT BREAKER - Protect your vehicle and device with intelligent overload control.

The TopDiag P200 9-30V Car Circuit Tester is a professional-grade diagnostic tool designed for 12V and 24V automotive systems. Featuring a high-resolution 320x240 TFT color display, it combines multimeter, oscilloscope, relay, injector, and diode testing functions in one compact kit. With an adjustable 0-5V power supply, intelligent circuit breaker protection, and support for online firmware upgrades, it ensures accurate, safe, and up-to-date diagnostics for cars, trucks, motorcycles, and marine vehicles. The comprehensive accessory set and robust build make it ideal for professional mechanics and serious DIYers alike.

Specifications

ASIN	B0912YBNQP
Brand Name	TopDiag
Colour	black red
Compatible Devices	Vehicles, Vehicle Electrical Systems
Customer Reviews	4.4 4.4 out of 5 stars (527)
Item Dimensions	38.5 x 29.2 x 10.7 Centimeters
Item Highlight	9~30V Voltage Range, Oscilloscope Mode, Multimeter, Relay Test, Fuel Injector Tester, Activating Component
Item Weight	1200 Grams
Manufacturer	TopDiag
Maximum Operating Voltage	30 Volts
Measurement Type	Multimeter
Minimum Operating Voltage	9 Volts
Model Number	P200
Number of Items	1
Number of Packs	1
Part Number	P200
Power Source Type	Battery Powered
Specification Met	CE
Style Name	Digital
UPC	791734860403

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