The E18-MS1PA2-PCB is a ZigBee Module manufactured by Ebyte that is ROHS Compliant. It uses 2.4G frequency, has a power output of 22dBm and supports 256 channels. It also features an external antenna and a compact form factor (only 10mmx10mm). It is a small, low cost, low power module designed for wireless communication in monitoring and control applications. It is also suitable for Smart Home applications and Internet of Things (IoT) applications.