The HM-TRS433 is a number of 433 MHz RF wireless transceiver modules from Hope Microelectronics. The module enables ultra low power wireless solutions, allowing for data transmission over a range of up to 400 meters. With a small size and low power consumption, the HM-TRS433 is suitable for battery operated applications. It can also support multiple data rates and modulation styles, including OOK, 2FSK, GFSK, MSK, and 4FSK. The HM-TRS433 has built-in error handling for connections, as well as up to 16 kinds of address filtering. The module can also be used for synchronous communication between two endpoints in an application.