Is PandwaRF USB or Bluetooth Smart?

Both.
You can link with PandwaRF using an Android/iOS smartphone with a Bluetooth Smart feature.
In some cases, you will need a higher throughput than what BLE can offer, so you will have to use PandwaRF using its USB port.
You can connect PandwaRF to an Android Smartphone with an USB Host mode (the USB host mode is supported in Android 3.1 and higher) using a USB micro Male/Male cable.
You can also connect PandwaRF to a computer (Linux) and use #rfcat Python scripts or our native C stack to send/receive data.