Vesternet started having their Vesternet Mondays promotion since 27th June 2016. During Vesternet Mondays, you will get up to 20% discount for Vera, Fibaro, Aeon, Qubino, Foscam, and Popp Products. Every monday there are different products on sale.
The MultiSensor 6 can be powered by both USB (Micro USB) or by 2x CR123A batteries. The batteries are not included in the packaging. Based on the specifications, the batteries are able to last you about 2 years.
After getting my hands on the Fibaro Starter Kit which includes a wall plug, I got kinda addicted to monitor my energy usage of my always-on switches like the television switch, Internet switch and computer switch.