The DexHand021 S is a thousand-dollar level, high-performance three-fingered dexterous hand designed for scientific research, educational, service, and industrial applications. It incorporates patented rigid-flexible coupled transmission technology, offering 8 DoF and a 22N grip force. Capable of performing approximately 80% of core hand manipulations—including stable grasping and tool use—it combines a lightweight (0.6 kg) and industrially durable design with integrated visual/tactile multi-modal perception. This makes it adaptable for scenarios from service robotics and industrial inspection to agricultural harvesting. Supported by a fully open-source ecosystem that lowers the development barrier and accelerates secondary development, its core advantages are low cost, easy maintenance, multi-protocol compatibility, and plug-and-play usability, making it substantially enhance the functionality and cost-effectiveness of robotic end-effectors.