The E22-400T22S is an electronic part manufactured by Ebyte which is a Wireless Modules SMD, 16x26mm RoHS. It is an ultra low power Long Range Transceiver Module from the sub-GHz frequency band. It works on 433/470/868/915 MHz frequency band and supports bi-directional communication. This module is designed to be used in a variety of wireless industrial, medical and consumer applications ranging from smart home, Wearable, toys to energy metering, etc. It is built with integrated RF power amplifier, PLL, SPI interface, ultra low power control unit, etc. and is FCC, CE, IC and ETSI compliant.