Bluetooth Low Energy (BLE) technology does not require a licence for use, making it a popular choice for various devices including smartwatches, fitness trackers, laptops, PCs, smartphones and industrial equipment.
BLE operates in the 2.4 GHz ISM (Industrial Scientific Medical) band, which is licence-free in most countries. This means that anyone can use this frequency range without obtaining a specific permit which has contributed to the widespread adoption of BLE technology. BLE is an open standard managed by the Bluetooth Special Interest Group (SIG), which allows for broad implementation across various devices.