A wireless-controlled robotic insect with ultrafast untethered running speeds has been developed. This 2-cm-long microrobot, named BHMbot, achieves a running speed of 17.5 BL s⁻¹ and a turning centripetal acceleration of 65.4 BL s⁻². It can navigate complex trajectories, including circles, rectangles, and irregular paths, using wireless control. The BHMbot can carry payloads and perform tasks such as sound signal detection, locomotion inside a turbofan engine, and transportation via a quadrotor. The robot's high-speed running is enabled by the complementary combination of bouncing length and high bouncing frequency. The BHMbot's design includes two electromagnetic actuators, two transmissions, and a support frame. The robot's performance is optimized through parameters such as body length, tilt angle, and actuator frequency. The BHMbot's untethered locomotion performance is evaluated using metrics such as relative running speed and turning centripetal acceleration. The robot's energy efficiency is characterized by the Cost of Transport (COT), which is calculated based on power consumption, mass, and speed. The BHMbot's performance is compared with other microrobots and natural creatures, showing it achieves high speeds and agility. The robot's potential applications include search and rescue missions, structural inspection of aero engines, and collaboration with drones. The BHMbot's design and performance demonstrate significant advancements in the development of insect-scale microrobots for high-speed, untethered locomotion.A wireless-controlled robotic insect with ultrafast untethered running speeds has been developed. This 2-cm-long microrobot, named BHMbot, achieves a running speed of 17.5 BL s⁻¹ and a turning centripetal acceleration of 65.4 BL s⁻². It can navigate complex trajectories, including circles, rectangles, and irregular paths, using wireless control. The BHMbot can carry payloads and perform tasks such as sound signal detection, locomotion inside a turbofan engine, and transportation via a quadrotor. The robot's high-speed running is enabled by the complementary combination of bouncing length and high bouncing frequency. The BHMbot's design includes two electromagnetic actuators, two transmissions, and a support frame. The robot's performance is optimized through parameters such as body length, tilt angle, and actuator frequency. The BHMbot's untethered locomotion performance is evaluated using metrics such as relative running speed and turning centripetal acceleration. The robot's energy efficiency is characterized by the Cost of Transport (COT), which is calculated based on power consumption, mass, and speed. The BHMbot's performance is compared with other microrobots and natural creatures, showing it achieves high speeds and agility. The robot's potential applications include search and rescue missions, structural inspection of aero engines, and collaboration with drones. The BHMbot's design and performance demonstrate significant advancements in the development of insect-scale microrobots for high-speed, untethered locomotion.