Here are a few great desk fan options for around R400: The Green Rechargeable MINI Square Desk Table Fan is a great compact fan that's perfect for small spaces. It's rechargeable so you don't have to deal with cables and at R199 it's within your budget. The Adjustable MINI Handheld Desk Fan Black is even more affordable at R195. It has adjustable wind speeds and angle so you can direct the breeze exactly where you need it. Both of these fans have great reviews and will keep you cool this summer without breaking the bank. Let me know if you need any other recommendations!
