Features: Equipped with two fans distributed at the waist Effective cooling reduces heat by 20% Lightweight and breathable mesh polyester fabric Full protection from sun and UV rays Sleeveless design suitable for men and women Supports an external power bank to operate the fans 3 air speed levels (low, medium, high) Quick Details: Size: XXL Color: White or Light Blue Material: 100% Polyester Operation Method: USB via power bank Cooling Levels: 3 speeds Usage: Sports, climbing, fishing, field work, extreme heat Package Contents: Cooling vest (size 2XL) Two side fans Control and connection cable How to Use: Connect the cable to the power bank (5V 2A) Press the power button to turn on the fans and switch speeds Make sure to remove the fans before washing Do not use in flammable environments