PrimeBOT T1 is the world’s first consumer-grade transformable personal robot, designed to accompany users across indoor life, outdoor exploration, learning, and creative experiences. Unlike conventional robots built around a single mechanical form, T1 combines bipedal humanoid and quadrupedal modes in one platform. In humanoid mode, it is optimized for indoor environments and human-centered interaction; in quadrupedal mode, it gains the stability and mobility needed for outdoor movement and complex terrain transitions. T1 can autonomously select and switch forms according to its environment and task, allowing one robot to remain useful across different parts of daily life. Its mobility system supports a top speed of 10 km/h, zero-radius turning, silent movement, bionic stair climbing, and slopes of up to 35 degrees, giving T1 the flexibility to move from home environments to outdoor activities.