Wal Mart has on clearance the Onn (Wal Mart brand) Presentation Clicker. It is basically a wireless PowerPoint remote. Many places show $3, though some are as low as $1. Not sure I would trust it in a business setting, but for that price worth a shot. Check Brickseek for availability and pricing in your area.
https://brickseek.com/walmart-inv…=57454609
Here is a link to the product at Wal Mart, but remember this deal is in store only.
https://www.walmart.com/ip/ONN-Pr…/574546090
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