Bluetooth Low Energy (BLE); Embedded sensor; Wearable technology.. Small, compact, and embedded sensors are increasingly pervasive in everyday applications such as wearable devices, home automation, and e-health systems. Wireless transmission plays a crucial role in these technologies, with Bluetooth Low Energy (BLE) emerging as a leading solution due to its combination of good performance, low energy consumption, and widespread adoption. This work reviews the methodologies used to evaluate BLE performance, with a focus on its protocol characteristics and performance metrics. The review covers key aspects such as throughput, maximum number of connectable devices, power consumption, latency, and maximum range. The results indicate that while BLE throughput can theoretically reach ~230 kbps, practical applications typically show through puts limited to ~100 kbps. Range is dependent on radio power and can extend up to several tens of meters. The maximum number of connected nodes is typically less than 10, influenced by connection parameters and network architecture. Power consumption and latency are influenced by numerous factors and require further experimental validation to better understand the true limits of BLE technology..