All models of LabQuest 2 will work with Go Direct sensors via USB, but pre-2014 LabQuest 2 models may need additional hardware when connecting to sensors through Bluetooth wireless technology.

How to Determine Your LabQuest 2 Model
Each LabQuest 2 is shipped with a label on the back. This label contains the model information.
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Model LQ2-LE
* Compatible with WDSS
* Compatible with Go Wireless devices (requires LabQuest App version 2.3 or newer)
* Compatible with Go Direct sensors (requires LabQuest App version 2.8.3 or newer)
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Model LABQUEST2 (This model was last shipped in August 2013)
* Compatible with WDSS
* Go Wireless devices will require a Go Direct® Bluetooth® Adapter (GDX-RADIO) and LabQuest App version 2.5 or newer.
* Go Direct sensors will require a Go Direct® Bluetooth® Adapter (GDX-RADIO) and LabQuest App version 2.8.3 or newer.
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NOTE: Your LabQuest 2 may need a software update in order to communicate with Go Direct Sensors via Bluetooth wireless technology. All models of LabQuest 2 can connect to a Go Direct sensor via USB without any additional hardware.

LabQuest® 2 Updates