Turn around the Bluetooth printer or scanner and make it discoverable. How to make the Bluetooth printer or scanner discoverable is determined by the device. To learn the way to make the Bluetooth printer or scanner discoverable, check the device's documentation or pay a visit to the manufacturer's website. https://www.bluetoothspeaker.top/hifi-subwoofer-parlante-portatil-sound-box-solar-energy-bluetooth-speaker-with-flashlight/