KINGBOLEN ECT300 Auto Electric Circuit Tester 0v-80v Resistance test Component Oscilloscope Probe Kit LED Display multimeter

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Product Details

Newest KINGBOLEN ECT300 0V-80V Auto Electric Circuit Tester Voltage Power Probe Kit LED Display Multimeter Oscilloscope Model Resistance test

KINGBOLEN ECT300 is suitable for 0V~80V automotive circuit tester, this circuit tester is well designed easy to operate, contain complete functions. The device equips TFT high-resolution color screen, test process and results can be intuitively and clearly displayed on the TFT screen. lt helps users understanding vehicle problems faster and more accurately, it is an efficient and advanced testing tool, which can greatly improve the user’s work efficiency.

Main functions: Voltage Test / Resistance Test / Diode Test / P-N Test / Frequency / Component Activation.

KINGBOLEN ECT300 Supported Languages:

English, French, German, Russian, Italian, Portuguese, Japanese, Polish, Czech, Polish, Chinese Simplified, Chinese Traditional

KINGBOLEN ECT300 Supports Circuit Test

It supports testing circuits, checking grounding, finding open wires, finding short circuits, testing voltage and P-N terminals, testing trailer connectors, diagnosing trailer lights, and checking connectivity.

KINGBOLEN ECT300 Supports Multimeter Mode Function

This device is powered by an external battery or car battery. Before you begin testing a circuit or component, connect the red clip to the positive terminal and the black clip to the negative terminal.

1. Voltage Test

Connect the red clip to the positive terminal and the black clip to the negative terminal.

Connect the probe to the positive terminal, and the display will show the maximum voltage, minimum voltage, and minimum voltage value.

2. Resistance Test

To access the resistance menu:
Connect the grounding clamp (auxiliary grounding wire) to one end of the resistor being tested, and connect the probe to the other end.

The device will then display the resistance value. (Please turn off the power before entering the resistance test).

3. Diode Test

Connect the grounding clamp (auxiliary grounding wire) to the negative terminal of the diode, and then connect the probe to the positive terminal. The measured value of the diode will be displayed

* If connected to the reverse terminal of the diode, no voltage value will be displayed.

4. ON/ OFF Test

Connect the grounding clamp (auxiliary grounding wire) to one end of the resistor and the probe to the other end. The screen will display the measured resistance value.

If the resistance value is ≥100Ω, the device will identify it as an open circuit, and the buzzer will not sound;

If the resistance value is <100Ω, the device will identify it as having good conductivity, the buzzer will sound continuously, and the red LED indicator will light up.

5. P-N Test

Connect the grounding clamp to the vehicle’s grounding wire, and then use a probe to contact the positive and negative terminals of the vehicle system.

When a positive signal is detected, the voltage value and the positive terminal (+) are displayed.

When a negative signal is detected, the negative voltage value and the negative terminal (-) are displayed.

6. Frequency Test

Connect the grounding clamp to the vehicle’s grounding clamp, and touch the probe to the location to be measured.

The screen will display the frequency and duty cycle of the measured signal.

KINGBOLEN ECT300 Supports oscilloscope Mode Function

After entering oscilloscope mode, the current signal waveform will be displayed, “MAX” is the maximum value, “MlN” is the minimum value, “Freq” is the frequency, “Duty” is the duty cycle, press the “OK” button to lock the current display waveform, which is convenient for comparison and observation of the waveform.

Note: In both multimeter mode and oscilloscope mode, press the “◎K” key to lock the current display interface.

KINGBOLEN ECT300 supports component activation:

The activation function can be used to activate components such as starter, fuel pumps, solenoid valves, blowers, cooling fans, headlights, etc.

Connect the grounding clip to the negative pole, connect the probe to the positive pole, press the “Up” button, the probe will output a positive voltage, and display the voltage value at the same time. the buzzer will beep continuously, the red LED light on the screen will light up. The test part will be activated.

The probe can output both positive and negative voltages. Press the “Up” button, the probe will output a positive voltage, the red LED light wil light up, and the voltage value will be displayed on the screen at the same time. Press the “Down” button, the probe will output a negative voltage, the green LED light will light up, and the buzzer will sound. The maximum activated output current is 8A, if it exceeds 8A, the trip protection function will be activated, the device will be restarted.

KINGBOLEN ECT300 Supports Reverse Protection

KINGBOLEN ECT300 Supports Car List

KINGBOLEN ECT300 test all 0-80V Vehicle Electrical Systems. More professional, faster, and smarter.

It can support 12V cars, 24V trucks, excavators, RVs, boats and motorcycles.

KINGBOLEN ECT300 Parameter

Input Voltage: 8V~ 32V
Test Voltage: 0V~ 80V
Operating Current : 80mA
Activation Current: 0~8A
Operating Temperature: 0°C~60°C (32°F~140°F)
Storage Temperature: -40°C~70°C (-40°F~185°F)

KINGBOLEN ECT300 Packing list

 

 

Item Specifics
Display Size:
Others
Software Update:
Yes
High-concerned chemical:
None
Reviews
(5)
Verified Buyer
Customer
7 Apr 2026 00:00

As described, fast delivery, I recommend this store 👌👌👌

Verified Buyer
Customer
28 Feb 2026 00:00

Topzera products are really good, they measure well. I intend to purchase more. Good sales to the seller, thank you very much for the shipment.

Verified Buyer
Customer
11 Feb 2026 00:00

Thank you

Verified Buyer
Customer
10 Feb 2026 00:00

It looks very good, you have to try it but it seems to be of good quality.

Verified Buyer
Г***ч
24 Jan 2026 00:00

Bought for 1739 rubles. The probe sits crookedly. The product works. It's a pity that the wire is ordinary PVC, it becomes stiff in the cold. Need time to test. I don't know if it can be inserted everywhere.

Shipping & Returns

SHIPPING

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have been shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 15-40 Business days
Canada, Europe 15-40 Business days
Australia, New Zealand 15-40 Business days
Central & South America 15-40 Business days
Asia 15-30 Business days
Africa 15-40 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

RETURNS

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.

Refunds

Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of car accessories (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of https://www.carforaccessories.com

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.

Exchanges

If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Why Buy From Us

A few reasons why buy from us:

SAFE SHOPPING

We try our best to make your shopping experience not only pleasant, seamless and hassle-free, but also secure.

FREE SHIPPING

Enjoy flexible international shipping services that currently operate in over 200 countries across the world.

NEW ARRIVALS

Brand new products are available on a regular basis.

PRICE PROMISE

We don't want you to choose between the best value and the best service. That's why we offer competitive pricing.

EXCELLENT CUSTOMER SERVICE

Knowledgeable and professional support team is always happy to help you.

EASY TRACKING

Check your order status online. As easy as that!

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