Bluetooth Low Energy (BLE) is a wireless technology that allows devices to communicate with each other with minimal energy consumption. There are several synonyms for BLE, including Bluetooth Smart, Bluetooth 4.0, and Bluetooth LE. These terms are all used interchangeably to refer to the same technology. BLE is often used in applications where battery life is critical, such as wearables, medical devices, and sensors. Its low power consumption allows it to function for extended periods of time without recharging or replacing batteries. Regardless of the name used, BLE is an essential technology for the Internet of Things (IoT) and will continue to be an important component of future smart devices.