So, this is my 4th mini1300 I have purchased on Amazon, all from different sellers. 1st one came with missing screws on the case and the screw holes were stripped, appeared to be used previously and did not have the upgraded firmware, so immediately returned. 2nd one came with original firmware, was able to update the firmware but it is a process and you have to be somewhat efficient with computer theory. It worked good for a week or so, but then just stopped working, so returned it. Also, this one had a weak battery as well. 3rd one came with original firmware, but didn't work, SWR numbers were all over the place after and before calibration and the battery would not hold a charge.Then I ordered this one, which was the lowest price on Amazon for the Mini1300, and it came with the upgraded case with unused ports, but did have the version 1.04 firmware installed. Calibrated the OSL and Vna, and boom, very good readings throughout the 2m, 70cm, and 1.25m bands. Tested it on dummy load and through my antennas, all were very consistent and accurate. Also has a strong battery that came charged and it holds a charge as well. I have only used for two days, but so far so good.In conclusion, this Mini1300 came like it should with the most updated firmware and works good, and is also the lowest priced Mini1300. The Mini1300 when it works is a very good antenna analyzer for the price point, just took me four tries to get the right one. Highly recommend this seller if you are purchasing one.

I like it very much is easy to to operate

HAM Radio operator: The Mini1300 Antenna analyzer is far cheaper than most other analyzers, and does more and is easier to use. The main menu is very user friendly. I used it for a couple hours constantly to figure out tuning on a WRC antenna in multiple bands, battery is still above 70%. You will need an adapter to use standard coax, but no big deal. Calibrating was easy, all required parts come with it. Multiple ways to tune/check tuning on your antenna. One word of caution: The manual is terrible. Youtube has several videos that are far more useful in how to use it.

This device has been excellent with our students in the after school HAM Radio Class. It creates a graphical picture of the efficieny of their DIY UHF/VHF antenna. They really get a good feel for how we trim the elements to move the resonance point of their antenna to better center their design to the target frequency. I would go as far to say every HAM station should have one of these devices. It can be a bit complex to calibrate, but once there this device is impressive for the price.

It's good up to 70cm but beyond I don't trust it. Compared it to two rig experts on 900 & showed 4 to 1 when actually 1.3 to 1. Honestly I trust the RE's more. Other than that it's decent & has some really cool features. More of a toy than anything else.

Does exactly what I needed to and then some only thing I would say would be a negative is the lack of instructions a little bit more info on what each thing does would be helpful

Unit seems to be well made and price was right. I've done some testing with known good items and the numbers match up very closely. I would invest in a N style cal kit since the supplied SMA are cumbersome.

This is an excellent little analyzer. I must say I am impressed. First of all, this is a commercial implementation of a private open source project by a ham radio operator, and improved/contributed to by others. My hats off and many thanks to them.This unit, all virtually identical, are available from a wide range of sources, many shipping directly from China. Prices vary widely from the upper $300s to around $160.00, where this one was priced when I purchased it. I found the packaging, solidity and build quality to be truly excellent. The case is a thick gauge metal, and is well finished. The connectors are of good quality and the button seems solid. The touch screen is bright, a nice size and functions well. The functionality and features are excellent, and mostly intuitive if you are technically versed.This brings me to the manual. I have never seen a manual like this. It is a mixture of Chinese, German and English, with some sections being written in random selections of these languages. It is not readable, even if you read all three languages fluently. Really, almost nothing about the features or operations are explained. Consider you will not be receiving a manual and you won't be disappointed. I must say this doesn't make much sense to me. To develop and commercially produce a piece of hardware like this is a big enterprise. Spending a little time and money to produce a reasonably good quality manual to be included, or to provide a PDF file download link, would be a very easy task. I will not deduct for this. If this was an expensive commercial product that would be a different story. There is a lot of information available online. Use it! The “Analyzer-EU1KY” discussion group is a good place to start. They have a good manual there. There is also a schematic, plus other very good information and resources. Many videos are also available which will detail various features and calibration. It does come with RF adapters and the Short, 50 Ohm, Open SMA calibration termination resistors. These are are not labeled, however. There are two gold ones and one silver one. The short gold one is the Short. The Silver one is 50 Ohms and the longer gold one is the Open.I read many of the other reviews, both here and elsewhere. Most of the extremely negative reviews, unjustified in my opinion, are based on unrealistic expectations, lack of understanding of how the unit functions, how to calibrate it properly and/or a failure to understand which features are implemented and should be functional. For example, three points: Not all of the connectors on the bottom of the device are functional by design. The firmware can be updated either by loading it onto the included Micro-SD card or by using ST Link software. I would not recommend doing this unless you really know what you are doing. The firmware installed is the latest version at the time of this writing. Also, this unit does not currently support being used remotely via USB computer control. This feature could likely be programmed into it, via a firmware modification. That’d be a good project for you to contribute! The computer connection is strictly to allow the device’s SD card to be mounted as a disk drive on the computer allowing easy transfer to snapshots, etc. One word of caution – The unit will allow you to do things to it in the configuration menu, and also via USB/SD card, that could cause you problems. Record your changes if you are uncertain, so you can change things back if you are at all unsure. Don’t run the Hardware calibration unless there is a specific reason to do so. Running this requires opening the unit and setting a jumper. This has been done prior to shipment and should not need to be repeated unless the firmware is updated, etc.This is a very feature rich device. I purchased it primarily to use in building and adjusting antennas. I also use it with an antenna matching unit to make adjustment more easy than simply looking at an SWR reading. I can not stress enough that the unit must be properly calibrated in order to function accurately. Once this is done, it should perform very well. I have used it on multiple HF bands, with a variety of antennas, as well as 6M, 2M and 70 CM. The specific SWR readings have been as expected and are on par with mechanical meters I have used on these same antennas. I swept the entire HF band at my QTH on a 160 – 6M UNUN end fed “L”. The graph was perfectly as expected. I also tested the manual settings of my tuner on various frequencies across the HF band with several antennas. These were also spot on. I can not comment on the "to the decimal point" readings for specific frequencies and I have not done a band by band, frequency by frequency comparison with a high dollar lab grade analyzer. I am sure there may be differences. But, considering that this unit is several magnitudes less costly I don't really think this would be a sticking point. This alludes to my comment above about expectations.This device has more features than you are likely to ever need much less use if you are a Ham or electronic hobbyist. Such a tool would have been unimaginable just a few years ago. It provides so much information. It is perfect for sweeping antennas or operating spectrums, testing filters and generating high accuracy test signals. It has a very broad operating range. It is not comparable with most of the Vector Analyzers which are available at much lower price points, some of which are quite good. But, they lack the robust features this unit has. At the price point here on Amazon, shipping from a United States ship point, free delivered in several days, and the ready ability to return it immediately if you are not satisfied for any reason you absolutely can not go wrong. This device can be described as potentially complicated. That’s not a bad thing. Do take the time to visit the developer links, download a good manual, watch videos, and become familiar with your little device. I think it is highly likely that you will be pleased.