The way that the updated PS-2600A Spectrometer pairs to the Spectrometry software is different to how the original PS-2600 pairs to the software. The PS-2600A will pair directly with the software without having to first pair the device to the computing device operating system.

The following knowledge base article outlines this process. The wireless connection of the PS-2600A will require Bluetooth 4.X capabilities on your computing device.
Differences in Pairing PS-2600 and PS-2600A to Spectrometry software

The PASCO documentation team has also placed this information within the documentation for their Spectrometry software.
https://help.pasco.com/spectrometry
https://help.pasco.com/spectrometry/getting-started/connect_a_spectrometer/

We also have additional support materials on the updated website for the PS-2600A linked to below.
https://www.pasco.com/go?PS-2600A
https://www.pasco.com/products/sensors/wireless/ps-2600a#documents-panel

Charging Tips for Spectrometers

In order for this device to work well for you, you will need to download and install the software that is linked to below.

Windows: https://cdn.pasco.com/software_release/spectrometry/Spectrometry-2.5.0.4.exe
MAC:  https://cdn.pasco.com/software_release/spectrometry/Spectrometry_Mac-2.5.0.4.dmg

The iOS and Android versions have been posted to the following links.
IOS (iTunes)
Android (Play.Google)

For Android devices that do not have access to the Google Play store, the following link is to the latest version of the APK to enable manual loading of the software onto your compatible Android device.
https://cdn.pasco.com/software_release/spectrometry/android-build-release.apk