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Upgraded MUSTOOL MT99 True RMS Digital Multimeter Fully Auto-Range

7 reviews
100% of buyers enjoyed this product! 1067 orders
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Are you worried about choosing a multimeter as a gift
For your elders who do some diy regularly.
For your friends who is a electrician or profession.
For your child who is a student or go to school soon.

Please continue to understand our product – MUSTOOL MT99!!! The highest appearance value smart multimeter until now and more functional Than MUSTOOL MT77!!!
Upgrade Functions as Follow(Updates(compare with MT77):
1. High EBTN LCD large screen design
2. The world’s fastest capacitance measurement speed
3. The resistance measurement range is 1Ω-10MΩ;
4. Maximum display value: 9999;
5. Automatic identification and capacitance measurement of diode on-off gear position;

1. Ultra-large EBTN LCD, 3-line display, can show 3 test results on the screen, such as voltage, frequency and analog bar
2. Ultra-thin body, portable hanging hole, comfortable operation and easy to carry
3. Unibody test leads design, one step to test, no need to plug and pull
4. Singe button to start smart identification function, no need to switch gear, say goodbye to cumbersome operation
5. Back flashlight design, no fear of dark environment
6. AC and DC voltage test
7. Resistance, continuity
8. Data hold, automatic power off
6. Frequency test
8. LIVE: neutral and live wire judgment (live wire check)
10.V~alert: dangerous voltage alarm (non-contact voltage detection)
12. Automatically identify diode and continuity
13. Capacitance test
14.Fastest measurement speed,especially for testing Capacitance.


DC Voltage 600V/0.1V ±(0.8%+3) min input voltage:0.5V
max input voltage:600V
input impedance:10M
AC Voltage 600V/0.1V ±(1.2%+5) min input voltage:1V
max input voltage:600V
input impedance:10M
Resistance 1Ω-10MΩ (1.2%+3) Overload protection 250V AC/DC
Capacitance 1000uF/0.1uF (3.5%+8) Minimum measurement capacitance 0.5uF
Overload protection 250V AC/DC
6000uF/1uF (4.5%+10)
Frequency 10HZ-1000HZ (2%+10) RMS above ACV1V
Maximum display value 9999
Automatic shutdown
Diode less than 1.0V diode automatic identification
(Non-contact voltage detection)
live wire check
Undervoltage warning

Package included:
1 x Smart Digital Multimeter
1 x Test Lead
1 x User Manual


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 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 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 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.


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.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

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.

  • 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 (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*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.


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.

Real customer reviews

7 reviews
100% of buyers enjoyed this product!
5 stars
4 stars
3 stars
2 stars
1 star
verifed buyer
25 Jun 2020

I liked it, you can buy

verifed buyer
25 May 2020

Very Cool Product

verifed buyer
11 May 2020

The multimeter came in a regular package. But it's okay. Everything works.

verifed buyer
19 Oct 2019

Very good device

verifed buyer
14 Oct 2019

Very nice and good quality. fast shipping. Highly recommended.... A+

verifed buyer
2 Oct 2019


verifed buyer
12 Sep 2019

Excellent multimeter

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