Powerful & Silent Cooling : Equipped with high-speed DC motors, delivers strong airflow while maintaining whisper-quiet operation (≤36dB). 3 adjustable speed settings let you customize cooling intensity for workouts, hiking, or daily commutes. NTC Cooling System: Instant response cooling technology achieves rapid temperature reduction within 3 seconds. Equipped with three adjustable modes (C1/C2/C3), the back cooling system incorporates a high-performance heatsink to maintain optimal thermal balance, delivering high-speed cooling without heat generation during use. Designed for extended wear, activating the airflow system simultaneously enhances comfort and performance. Ultra-Durable Battery: Built-in 5200mAh rechargeable battery provides up to 10 hours of continuous use. USB-C (Fully charged 3.5 hours) Support charging usage with built-in safety protection. All-Day Wearable Comfort：Collar fan featuring an ergonomic design with scientifically balanced weight distribution(420g), contours perfectly to the neck's natural curvature. all-day comfort during extended wear. Adjustable airflow settings and variable cooling intensities allow versatile application across multiple scenarios, from intense workouts to office environments and outdoor activities. Peace of Mind Guarantee: We offer a comprehensive replacement service for any product defects or malfunctions discovered within six months of purchase. If your item fails to function properly under normal use conditions during this warranty period, simply contact our customer service team, and we will arrange a hassle-free replacement immediately. Powerful & Silent Cooling : Equipped with high-speed DC motors, delivers strong airflow while maintaining whisper-quiet operation (≤36dB). 3 adjustable speed settings let you customize cooling intensity for workouts, hiking, or daily commutes.