The Telegesis ETRX357 modules are low-power 2.4GHz ZigBee-compliant wireless modules, based on the Ember EM357 system-on-chip (SoC) device. The -LRS parts feature a range-boosting SiGe SE2432L Front-End chip., EM357 Cortex-M3 core SoC, 192kB Flash memory,