RN42 Series 3.6 V 2.4 GHz 4 dBm Class 2 Bluetooth® Module with EDR SupportPACK OF 70 PIECES The RN42 I RM is a small form factor, low power, class 2 Bluetooth radio module offering high performance and easy integration for designers looking to add wireless capability to their products. It is designed by Microchip Technology and is one of the professional series Bluetooth modules in their product line. Here are some of the key features and specifications for the RN42 I RM: Bluetooth Technology: It is based on Bluetooth 2. 1