The RS485-to-Zigbee and Zigbee-to-USB Wireless Transmitter & Receiver may be used instead of RS485-to-USB cables when connected an Energy Meter (e.g. ET112 or ET340) to a Venus GX or Color Control GX. The RS485-to-Zigbee Transmitter requires AC Power (note the units are currently supplied with a Power Supply fitted with a European 2-pin plug). The Zigbee-to-USB Receiver is powered via the USB connect to the Venus GX of Color Control GX.