The RC6621AI with SMD15.2x11.2x2.0mm Bluetooth Modules ROHS manufactured by RF CRAZY is a compact, ultra-low power, and high-performance Bluetooth module. It supports all Bluetooth 4.1 protocols, such as Bluetooth Classic, Bluetooth LE, and BLE Mesh. It is based on the nRF52832 chipset and is compliant to FCC/CE compliant. The RC6621AI module supports Class-1, Class-2, and Class-3 TX output power through external antenna connection, with a long transmitting distance and low power consumption. It also integrated a high-performance low noise amplifier, filters, and power management modules. The module is also RoHS certified.