★ Automatic Brightness Adjustment:After the light sensing of reaction lights, the brightness is automatically adjusted. The flexibility of light sensing is higher and the range is wider. Whether training lights is a dimly lit room or a sunny outdoor, the brightness can be as you like. ★ Small and Portable: Reaction Training LED Light are wrapped in flexible material, which can withstand 60kg of pressure and protect the trainer at the same time. Reaction training light only needs to be charged quickly through USB, and the battery life can reach 3-30 hours (depending on the brightness). ★ Fitness Partner: Flash Reflex Agility Training Lights best for training the brain and body to respond faster. When the eye sees the light, it immediately sends a message to the brain. The brain sends information to the body through neural pathways on how to perform movements correctly. ★ Reaction Training Light: Reaction Time Training Light is a light that improves your reflexes and coordinates your eyes, hands, feet and mind. Strengthen body, mind and soul with flash reflex training, perfect for fitness and fun. ★ Wide Application: Agility training lights can be used in basketball, football, fitness, fighting, hockey, track and field, elderly rehabilitation, Kendo and other sports. Professional athletes, athletes, Olympic medalists, club teams and individuals.