Classes. Generally, hardware differences in Bluetooth devices are more associated with the class of the device: Class 1: 100 mw or 20 dBm, range approx. 100m. Class 2: 2.5 mw or 4 dBm, range approx. 10m. Class 3: 1 mw or 0 dBm range approx. 1m (seldom used) Michelle Drouin. Bluetooth, technology standard used to enable short-range wireless communication between electronic devices. Bluetooth was developed in the late 1990s and soon achieved massive popularity in consumer devices. Among its key features were low power usage—enabling simple battery operation—and relatively low cost.
A sound card is a computer component that translates digital audio signals to analog ones, and analog audio signals to digital ones. Technically, a sound card is an optional component but a necessary one if you want to hear sound from your PC on wired headphones or speakers (just like an external DAC ), or plug in a mic with an analog output.
For some computers that have Windows 10. Click Start > Settings > Devices > Bluetooth. For some computers that have Windows 8.1. Open Charm > Settings > Change PC settings > PC and devices > Bluetooth. For some computers that have Windows 7. Click Start > Control Panel > Hardware and Sound > Bluetooth Devices. For some computers that have

Select Settings . Choose Devices . Select Bluetooth & other devices in the left pane. Turn on Bluetooth, if it isn't toggled on. Select Add Bluetooth or other device . In the Add a device window, select Bluetooth . Select the device you want to pair in the list of Bluetooth devices Windows finds.

Most modern computers have Bluetooth and Bluetooth drivers pre-installed. Some older computers may not have Bluetooth. If your computer does not have Bluetooth, you can add it using a USB Bluetooth dongle, or Bluetooth PCI card.
On your PC, go to Settings . Click Devices to access settings for Bluetooth and other devices. Click on the plus icon next to Add Bluetooth or other device. Then select Bluetooth. Wait for your Bluetooth device to show up, and once it does, select it. Wait for your PC to pair with your Bluetooth device. Depending on your device, you should get
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    • do all computers have bluetooth