To connect the JADENS Bluetooth Thermal Shipping Label Printer to your smartphone or computer, start by ensuring the printer is powered on. For a Bluetooth connection, open the Bluetooth settings on your smartphone or tablet and search for available devices. Select the JADENS printer from the list and pair the device according to the on-screen instructions. If you're using an iOS or Android device, you may need to download the 'JADENS Printer' app from Google Play or the Apple App Store. For a USB connection, simply connect the printer to your computer using the provided USB cable, then install the necessary drivers from the included U-Disk or download them from the JADENS website. Follow the on-screen prompts to complete the setup process.