The RFM42B-433-S1 is a low-cost, high-performance, short-range transceiver module from Hope Microelectronics. It operates in the 433 MHz frequency, and is based on the High Performance Low Power RF transceiver, RFM42B. This module is designed to provide superior, reliable long-range communication for low-power applications such as home automation, remote control, location tracking, and wireless data communication. Its features include low power consumption, low voltage operation, carrier sensing, and a high sensitivity throughout the 433 MHz band. This module is available in both surface-mount and through-hole packages.