AC Infinity MULTIFAN S7, Quiet Dual 120mm USB Fan, UL-Certified for Receiver DVR Playstation Xbox Computer Cabinet Cooling Amazon.com
OPOLAR 4 Inch USB Small Desk Fan, Ultra-Quiet Design, with 360 Rotation, 3.8 ft Cable, Portable Cooling for Home & Office,Brown https://www.amazon.com/dp/B01MYMXK92/ref=cm_sw_r_cp_api_glc_fabc_9WR4KB3EEGHQEXPQXCG0
Just a few examples.