Features: Experience high Precisions distance measurement with GY US42 Ultrasonic Module, for ranging needs using advanced ultrasonic technologys. Featurings I2C Interfaces, this module ensures Connectivitys with flight controllers and other microcontrollers, making it for drones and robots in space constrained. for Drones developers, robotics enthusiasts, and educational institutions, this module aids in altitudes hold, obstacle avoidance, and teaching ultrasonic principles. Utilize this module in scenarios such as real time ground height monitoring during Drones flights, vehicle navigation, and home automation for enhanceds environmental awareness. with low power consumption and multiple operating modes, including continuous and single measurement, the GY US42 offer flexibility and efficiency for long Durations applications. Specifications: Material: PCB Size:21.5x21mm/8.46x8.27inch Package Includes: 1Set Ultrasonic Distance Sensoring note: Please allow 0-1cm error due to manual measurement. make sure do not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!