Turn to the Bluetooth printer or scanner and make it discoverable. The way to make the Bluetooth printer or scanner discoverable is dependent upon the device. To find out how to make the Bluetooth printer or scanner discoverable, check the device's documentation or pay a visit to the manufacturer's https://www.bluetoothspeaker.top/hifi-subwoofer-parlante-portatil-sound-box-solar-energy-bluetooth-speaker-with-flashlight/