The A121 range sensor is based on 60GHz pulsed coherent radar (PCR) technology, enabling human presence and motion detection, and supporting high-precision distance measurement. • A121 60GHz pulsed coherent radar (PCR), integrating RF, baseband, and AiP antenna, supports human presence, micro-motion detection, and high-precision ranging. • Integrated Arm Cortex-M4 MCU (STM32L431CBT6), 80MHz, 128KB Flash and 64KB RAM, supporting local radar processing. • Compact 39x39 (mm) size with optimized antenna structure for high gain and stable detection. • Supports UART, I2C, and GPIO interfaces, outputting radar detection results based on register protocol. Operating Frequency Band: 60GHz Modulation Method: PCR Supply Voltage: 5V IO Level: 3.3V Output Interface: USB / UART / I2C Communication Baud Rate: UART: 921.6kbps; I2C: 100K / 400K Detection Distance Resolution: 0.03m @ 25° Profile1 Detection Angle: Horizontal: 53°; Vertical: 65° Detection Accuracy: 0.03m @ Profile1 Maximum Operating Current: 5V 80mA Color: Blue Material: PCB Package Contents: 1*Range Sensor 1*10-pin Connector Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.