The portable neck fan is made of environmentally friendly ABS fireproof material. Each fan head combines 7 bionic fan blades to make the blade softer, more durable and quieter. The personal portable neck hands-free fan has a low/medium/high speed mode that adjusts the wind to suit your needs. To prolong the battery life and prevent the battery from losing power during transportation and storage resulting in failure to turn on, we recommend that after you receive the neck fan, please charge it for 30 minutes before using it to turn it on and use it.