At Milipol 2025, Beijing Ribri Technology introduced the RB21H spherical robot, a compact unmanned ground platform engineered to deliver high-clarity audio messages in noisy security environments. Designed around a powerful high-SPL acoustic module, the robot aims to support patrol units that require reliable voice projection during demanding operations.
At the core of the RB21H is a high-performance acoustic system capable of reaching 142 dB × 2 peak SPL and 134 dB × 2 continuous SPL. These specifications ensure that the robot can transmit clear verbal warnings, alerts, and instructions even in areas filled with engines, crowds, alarms, or industrial noise. This focus on audio performance makes the RB21H distinct within the UGV landscape, where most systems prioritize visual sensors over acoustic output.
The platform weighs approximately 180 kg and reaches speeds of up to 34 km/h, placing it among the faster unmanned ground systems in its class. Its mobility allows quick repositioning across urban patrol zones, enabling it to complement ground teams during routine surveillance or rapid-response missions.
According to Ribri Technology, the RB21H is designed as a remote communication node, enabling operators to deliver voice commands from a safe distance. This capability supports scenarios where direct human presence is limited due to safety concerns or operational constraints. As such, clear voice projection is not merely a feature—it is the system’s primary mission.
The introduction of the RB21H highlights a broader shift in how unmanned systems are used in security operations. China’s new approach positions robots not only as auxiliary reconnaissance tools but as integrated patrol assets that work alongside personnel in real time. When combined with drone surveillance—which offers rapid deployment, wide-area monitoring, and thermal or visual imaging—these systems contribute to a networked, data-driven security architecture that enhances situational awareness and reduces risk to personnel.
