Anysecu SF-103 A-SF103 Portable Frequency Counter 2MHz - 2.8GHz for Two Way Radio Upgrade Version of SF401

An accurate frequency counter at this price point gets 5 stars. It consistently nails the frequency within .001 MHz, and accurately determines tones. The DMR functionality also performs as expected. UI & manual are not the greatest, and it doesn't hold the last frequency on the display; but for the price - it's great. I notice other reviewers having issues with it ceasing to function, and I suspect many have just overloaded the unit and damaged it. Do not put the transmitter right next to the counter, I keep them close to arms length on either side of me and it reads just fine.

Was a bit skeptical about buying this device because of its low price. But it does work! The SF-103 is geared towards ham radio operators, to allow them to verify that their radio is programmed correctly. For analog, it will show transmit frequency; and if repeater access tones (CTCSS/PL/DCS) are being used, what is being transmitted. For digital transmissions, it will display transmit frequency (although I wish it would also show DMR color code/timeslot - maybe in a future update). The wide 2 MHz-2.8 GHz range means that it will also work in the HF bands for measuring frequency and relative signal strength. The user manual is somewhat lacking and in poor English, but the unit is relatively easy to figure out.

This freq counter is powered by a small Li-ion battery that is inside to case. You must removed the four screws holding the case together then four screws holding a plate on top of the battery. On top of the case is a USB-C connector and the freq counter comes with a small cube power supply plus a short cable connecting the power supply to the USB-C connector. CHARGE THE BATTERY FROM TIME TO TIME -- plug in the power cube, connect the power cube to the freq counter with the supplied cable. A small LED on top of the freq counter will glow red then turn green when the battery is fully charged. I let the battery run down and had to wait six hours for it to recharge. Good freq counter. I am a ham radio operator and use this to check frequency and CTCSS tones on my various radios.

I am well pleased with this device. I am amazed at the accuracy and capabilities of this frequency counter. I highly recommend this for amateur radio and or rf testing.

I purchased this to figure out what frequency and lock code my local elementary school admin was using as they coordinate daily pickups from parents and school buses. From more than 50' away, I was able to capture the frequency (they weren't using any tones) and was quickly able to tune my Baofeng UV5R to the frequency. At that point I could hear what they were saying. Doesn't make any difference in the routine, or how I pick up my kids, but it does kill some of the boredom while waiting. Another use that might be of interest... If you've ever been stuck behind a road flagger allowing only one side to go (and you've been waiting forever) you can also listen in to what they're saying....

No accuracy to speak of. Even with a better, higher gain, directional antenna this frequency counter still can't seem to get the frequency right. I'm extremely disappointed with how badly this works. A friend of mine bought one a few years back and it worked okay, I understand this isn't a professional grade piece of equipment, but it should at least function of it's going to be sold. Huge bummer.

This is a excellent Frequency Counter. Very accurate, easy to use and the price is just right... I highly recommend buying this frequency counter for all your radio research needs...

Talked to the manufacturer and it's a bad unit. Check it out fully before the return window closes. I did not due to getting sick Nothing towards the seller.

Arrived early . Works well. Solid construction .Excellent clear display. The English version of the manual does not tell you what the numbers displayed on the screen mean .

Had an issue where where I needed to read 14Mhz. Worked with tech support. Concluded it was not working below 20Mhz as it was advertised to work down to 2Mhz. Great little tool for higher ranges.

El equipo no ha funcionado desde la recepcio. Le he acercado diferentes tipos de controles remotos y ninguno detecta la frecuencia como lo menciona en la publicidad.

Not to bad. Not always accurate though

Keep the device charged if used frequently.