
I have used this to mark various items. I used red for my 220 volt devices and green for my 110 volt devices. I used other colors to identify cables for my electronic devices like TV, DVD, XBox etc. The only downside is that the dark color labels are difficult to write on.

50Pcs Adhesive Cable Clips, Cord Holder Wire Management For Car, Office And Home (Black)
42 Review

7Colors-21Pack Reusable Silicone Twist Ties With Strong Magnets For Organizing Cables, Hanging Stuff, USB Cords & Fridge Magnets - Fironst 7.48" Magnetic Cable Ties
32 Review

Heavy Duty 8 Inch Nylon Self-Locking Cable Zip Ties - 100 Pack In Black
52 Review

Organize Your Cords With LuBanSir'S 3 Pack Extension Cord Storage Straps
27 Review