Bluetooth 4.2 is a wireless communication standard that allows devices to connect and exchange data over short distances. Released in December 2014, it offers improved speed and efficiency compared to its predecessor, Bluetooth 4.1. This version supports data transfer rates of up to 1 Mbps, making it faster for tasks like streaming audio or transferring files. One of the key features of Bluetooth 4.2 is its enhanced privacy and security measures. It introduces features like improved encryption and the ability to hide device addresses, making it harder for unauthorized users to track devices. This makes it a popular choice for smart devices and the Internet of Things (IoT).