What does it mean ”if you need to get s12/s22 curve, please exchange the tx/rx port manually”? is it easy to do?

To change the TX/RX port simply unscrew the connection cable from the upper port on the NanoVNA and reconnect it to the lower port.

Will the unit be the 3.4 if i order it now?

Yes, it is 3.4 version, if you order it now

I read in description "900 mhz - enable extended firmware." what does this mean? does it cost extra?

As I understand it, you can extend the range of the device by a firmware update. But there is a resulting decrease in performance. It’s a free update if you so choose. Wayne N4EYZ

What connection type does the battery charger use?

This is an add-on to the other answers that may prevent damage. Quote from specs. on this product page: "maximum charging current 0.8A" In other words, this may get damaged if more than a 1 amp USB charger is used.

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SEESII Nanovna-H Vector Network Analyzer,Upgraded HW3.7 9KHz-1.5GHz MF HF VHF UHF Antenna Analyzer, Measuring S Parameters, Voltage Standing Wave Ratio,Phase,Delay,Smith Chart,Support Data Storage

Product ID: 171114193

💾MicroSD data storage up to 32GB

📱2.8-inch touchscreen display

📶9KHz-1.5GHz wide freq range

13814 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📡 Unlock the full spectrum of antenna analysis — anytime, anywhere!

BROAD SPECTRUM MASTERY - Covers MF, HF, VHF, UHF bands from 9KHz to 1.5GHz — no antenna challenge too big.
DATA AT YOUR FINGERTIPS - Built-in MicroSD slot lets you save and archive field data effortlessly, supporting up to 32GB cards.
PRECISION MEETS PORTABILITY - Compact 2.8-inch touchscreen with upgraded HW3.7 for on-the-go pro measurements.
SEAMLESS SOFTWARE INTEGRATION - Control and analyze via NanoVNASaver on Android and PC for professional-grade insights.
COMPLETE CALIBRATION KIT INCLUDED - All essential SMA cables and calibration tools packaged for instant, accurate setup.

The SEESII Nanovna-H Vector Network Analyzer HW3.7 is a compact, portable antenna analyzer covering 9KHz to 1.5GHz frequency range. Featuring a 2.8-inch touchscreen, advanced frequency algorithm, and metal shielding for enhanced accuracy, it supports S-parameter, SWR, phase, delay, and Smith chart measurements. With built-in MicroSD storage, Android/PC software compatibility, and a comprehensive accessory kit, it’s designed for electronics engineers, amateur radio operators, and DIY enthusiasts seeking precise, on-the-go antenna diagnostics.

Specifications

ASIN	B08132DJLS
Batteries	1 Lithium Ion batteries required. (included)
Best Sellers Rank	#49,755 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Spectrum Analyzers
Date First Available	November 5, 2019
Item Weight	7.1 ounces
Item model number	NanoVNA-H
Manufacturer	Seesii
Package Dimensions	4.96 x 3.98 x 2.13 inches

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13814 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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