I have an ASUS ROG PHONE 7 fan. The fan has a very, very strong built-in speaker, Mashallah Tabarak Allah. I also have another fan for the ASUS ROG PHONE 6 or 6D. It also has control buttons without any delay. Among its features is the ability to stabilize the phone for viewing and enjoyment. Usage is very simple. The purchase price was 899, and the selling price is 500. Reduced the price to 350 due to urgent need for money, by God.