The ISP4520-US-ST with RF Modules is manufactured by Insight SiP, and is a type of integrated circuit that is used for low power, short-range radio transmission. It is equipped with an embedded Microchip PIC12F617 controller, allowing it to maintain a low power signal while providing a higher data rate than standard RF modules. The device also has an onboard antenna, allowing it to be used in applications with limited antenna space or no external antenna. Additionally, the device is compatible with a range of protocols, making it suitable for use in a variety of applications in the industrial, home automation, and consumer markets.