Turn to the Bluetooth printer or scanner and make it discoverable. How to make the Bluetooth printer or scanner discoverable is dependent upon the device. To learn how to make the Bluetooth printer or scanner discoverable, check the device's documentation or pay a visit to the manufacturer's website. In https://www.bluetoothspeaker.top/subwoofer-mobile-phone-inalambrico-speaker-light-audio-computer-bluetooth-speaker/