【No Power Required】This walking aid is designed based on bionic principles to simulate natural leg swinging motion, helping weak legs move more efficiently - no batteries, no motors, just smart mechanisms. 【Pendulum-Based Movement Enhancement】The internal mechanism uses your natural body weight and forward leaning posture to store and release energy with each step, assisting your legs with subtle, natural movements. 【Three-Level Torque Adjustment】Turn the knob clockwise to adjust the level of assistance for stronger torque. Perfect for adjusting to your rehabilitation progress or specific walking needs. 【Velcro Strap, One-Handed Wear】This brace is designed for easy one-handed operation and comes with two adjustable straps for quick and easy wearing. The ergonomic knee joint design fits securely and naturally follows the movement of your legs. 【Lightweight and Durable】Made of carbon fiber, stronger than steel but lighter than aluminum, with high-strength PA material at the joints. Comfortable and breathable, it can be worn all day.