The ZE51-2.4 and ZE61-2.4 are compact, SMD, and complete ZigBee®
                -ready modules that supports Full Function Device (FFD) and Reduced Function Device (RFD) operation with IEEE 802.15.4 compliant PHY and MAC layers.
                This is an ideal low-cost ZigBee module for small battery powered devices such as those used in advanced metering, building automation, and wireless sensor networks. The ZE51-2.4 supports low power modes up to 
                2.5 mW and operates in industrial temperature range from -40° C to 85° C.
Also available as DIP version or a USB Dongle.

