I have a 30M reel of Ilda cable attached to 2.5mm 3 core blue mains cable all on a roller plus an extra 10 meter extension roll of the same.
It comes with an emergency stop, keylocked system (removable key), green ON indicator & with 6x switched mains outlets and 2x permanent outlets for your PC/Lappy.
All works a treat.
£55
Jim