Product material: silicone + ABS + stainless steel. Product size: 152 x 230 x 70mm. Input voltage/current: 5V/1A. Plug interface: Type-C. Battery capacity: 4000mAh. Use time: about 4-9 hours, depending on the gear. Use speed: 2350 rpm in first gear, 3000 rpm in second gear, 3500 rpm in third gear. Decibel level: 28dB in first gear, 35dB in second gear, 42dB in third gear. Skin-friendly soft rubber material – The neck fan is made of high-quality silicone materials that are environmentally friendly and durable, offering a warm and soft touch. The ergonomic design allows for adjustable neck hanging to fit comfortably against the skin, and the back of the neck features a soft rubber texture that helps prevent slipping. Safety & 360 airflow design – The bladeless design ensures safe use for those with long hair, children, and the elderly. Adjust the fan angle to direct airflow toward your face and neck, allowing you to experience a full 360 airflow for instant cooling. Lightweight & portable design – This compact neck fan is stylish and comfortable to wear around the neck, with a lightweight build that minimizes strain. Whether you're working at your desk, relaxing by the pool, enjoying time in the garden, or taking a walk, this compact fan delivers a refreshing breeze to your neck and head to keep you cool.