Sfera Labs Strato Pi Fan is used to enhance the Raspberry Pi Model B version 2, 3, and 4 with a high-speed, temperature-controlled fan. It expands the operating temperature range of the Raspberry Pi. It also reduces or delays CPU throttling under heavy CPU load. NOTE: Raspberry Pi not included. https://elecena.pl/product/17765312/strato-pi-fan 2021-04-17 https://elecena.pl/product/17765312/strato-pi-fan 2022-03-25