The OKY3378-1 is a Bluetooth module manufactured by OKYSTAR with the latest Bluetooth V4.0 & BLE, operating on 3.3 VDC. It has a UART interface and built-in Nordic CC2540 chip, allowing for low power consumption and flexible operation. It is widely used in a variety of applications such as Bluetooth audio, home automation systems, consumer electronics, fitness products, healthcare, and more. The OKY3378-1 has an integrated flash memory that allows for connecting different Bluetooth enabled devices with ease, enhancing wireless transmission speeds and reducing power consumption. It supports both Bluetooth Classic and Bluetooth Low Energy, enabling both data and audio transfer. With the integrated SPI (Serial Peripheral Interface) it also allows for easy firmware upgrade and control.