KER300639 is an Etal-branded Bluetooth module, designed for use in remote control applications. It is a dual-module, low-power Class 1 Bluetooth module that supports both Classic Bluetooth 2.1+EDR and Bluetooth low energy 4.0 standards. It features long-range coverage of up to 200m, quick connect/disconnect, and enhanced security. It also has a miniaturized form factor, allowing for easy integration into any application. Additionally, the module offers excellent coexistence with other Bluetooth applications, making it ideal for commercial, military, and industrial applications.