With bluetooth you can make a wireless connection between your mobile and another device at a short distance. This way you can connect your smartphone or tablet, for example, to a speaker or headphones to listen to music wirelessly.
Many devices nowadays have a bluetooth connection, recognizable by (add icon). Making a connection with bluetooth is not difficult, but you have to perform the steps in the right order. Always make sure that the device you want to connect to is turned on. Consult the manual for your speaker or other device if making a bluetooth connection is not possible.