Simply plug warmer into a power point & add wax melts. The pluggable warmers suit smaller spaces such as bathroom, laundry, study etc. The scent throw will not be as good in larger areas so recommend these in small rooms.
Pluggable warmers are heated by small globe these will need replacing once blown and are available to purchase on my website. Please turn your warmer off at the on/off switch first then at the power point. I cannot guarantee how long a globe will last so I'd recommend ordering a spare when you purchase your warmer.