OmniHand 3 Ultra-M is a next-generation humanoid dexterous hand designed to bring human-like manipulation capability to embodied AI. It is the first robotic hand to achieve a human-scale form factor while integrating 21 active degrees of freedom, full direct-drive actuation, and full-hand tactile sensing — eliminating the traditional trade-offs between dexterity, precision, and compactness. With a 1:1 human hand size and a lightweight 630g design, OmniHand 3 Ultra-M enables robots to directly interact with human tools, replicate human demonstrations, and perform complex contact-rich tasks in real-world environments. Its high-resolution tactile perception and precise force control provide robots with the ability to sense, adapt, and respond like humans. By combining advanced robotics hardware with high-fidelity data generation capabilities, OmniHand 3 Ultra-M serves as a critical physical interface for training and deploying embodied AI systems.