Free samples are available. Our neck fans are made of soft silicone material, flexible bending structure provides you comfortable neck protection. This bladeless neck fan can be adjusted with 3 speed modes -low, medium and high. Charging around 3 hours with Input Power: 5V/1A, battery life will last about 3-6 hours. The product has a built-in 2000mAh battery, which does not need to be installed. There are 42 air outlets around this mini neck fan neck, providing you a strong cooling airflow to keep you cool during this hot season. A perfect giveaway to show your brand!