.The RN4870-V/RM140 with Bluetooth Modules 802.15.1 Bluetooth Low Energy BLE Module Shielded Antenna ASCII Interface 12x22mm manufactured by Microchip is a BLE module used to allow devices to exchange data over short-range radio frequency. It supports dual mode radio communications and can be used for remote sensing (GATT based applications) as well as point-to-point and point-to-multipoint data communication applications (SPP-based applications). It features low power consumption with a long-range performance of up to 100 meters, auxiliary back-to-back antenna, UART powered communication, advanced power management, floating pins, and memory safety partitions. The module is designed with hardware support for encryption, requires minimal code for quick development with small size and good looks. This BLE Module is FCC/IC certified, RoHS compliant, and CE compliant.