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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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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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: 300503105

💾MicroSD data storage support

📱Android & PC software control

📶9KHz-1.5GHz wide freq range

16100 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

PORTABLE POWERHOUSE - Compact 2.8-inch touchscreen design fits in your toolkit for on-the-go professional diagnostics.
SEAMLESS CONNECTIVITY - USB-C and Android compatibility enable real-time data control and export on your favorite devices.
DATA AT YOUR FINGERTIPS - Built-in MicroSD slot supports up to 32GB for effortless field data saving and timestamping.
PRECISION FREQUENCY MASTERY - Upgraded HW3.7 chipset delivers ultra-wide 9KHz to 1.5GHz range for unmatched antenna analysis.
COMPLETE CALIBRATION KIT INCLUDED - All essential SMA cables and calibration tools packaged for instant, accurate measurements.

The SEESII Nanovna-H Vector Network Analyzer HW3.7 is a compact, portable antenna analyzer covering 9KHz to 1.5GHz frequencies. Featuring a 2.8-inch touchscreen, advanced frequency algorithm, and multi-parameter measurement (S11/S21, SWR, phase, delay), it supports Android and PC software control with USB-C connectivity. Its built-in MicroSD slot allows easy data storage with timestamping, making it ideal for electronics engineers and radio enthusiasts seeking precise, on-the-go antenna diagnostics.

Specifications

ASIN	B08132DJLS
Batteries	1 Lithium Ion batteries required. (included)
Batteries Required?	Yes
Batteries included?	Yes
Battery Cell Type	Lithium Ion
Best Sellers Rank	39,677 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 19 in Spectrum Analysers
Colour	Nanovna-H
Customer Reviews	4.6 4.6 out of 5 stars (647)
Date First Available	5 Nov. 2019
Guaranteed software updates until	unknown
Included components	NanoVNA-H,SMA Cable,Connector,Calibration kit, Cable,On-screen Stylus
Item Package Quantity	1
Item Weight	200 g
Item model number	NanoVNA-H
Manufacturer	Seesii
Material	ABSå¡‘æ–™ã€ç”µåå…ƒå™¨ä»¶
Package Dimensions	13.6 x 10 x 5.3 cm; 200 g
Part number	USAYYWU0302
Power source type	Battery
Size	Compact
Special Features	Antenna Analyzer, Network Analyzer

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