UNO works with a variety of Bluetooth tags attached to your goods or objects.

Bluetooth Low Energy (BLE) tags, also known as beacons, are small-sized hardware components with an energy source for multiple years.

Great advantages of BLE tags:

Certified to be used globally (2.4GHz
The most cost efficient IoT enabler on the market
Sold by suppliers worldwide and available in many form factors
Very low on power
working together with devices we all have in our pocket