Indoor Bluetooth tags for the MikroTik KNOT or other IoT asset-tracking/telemetry setups. TG-BT5-IN: slim and sleek, perfect for indoor inventory tracking. Bluetooth tags play a huge role in IoT setups, where Bluetooth is used to broadcast the data over short distances. You can use these small devices for proximity-based tracking of various objects. For example, if you have a KNOT gateway in different parts of a construction site, you can use these tags to locate construction tools, electrical equipment, and other assets.