This module has stable performance and accurate distance measurement. It can be compared with foreign ultrasonic ranging modules such as SRF05 and SRF02. The module's high precision, the blind area (2cm) is super close, and the stable ranging is a strong basis for this product to successfully enter the market 2 Main technical parameters\1: Use voltage: DC5V 2: Static current: less than 2mA 3: Level output: High 5V 4: Level output: Bottom 0V 5: Sensing angle: no more than 15 degrees 6: Detection distance: 2cm- 450cm 7: High precision: up to 0.3cm wiring method, VCC, trig (control end), echo (receiver end), GND How to use this product: a control port sends a high level of more than 10US, and it can be used in the receiving port Wait for the high level output. Once there is an output, you can start the timer to count. When this port becomes low level, you can read the value of the timer. At this time, it is the time of this ranging, and the distance can be calculated. The cycle measurement, you can reach the value of your mobile measurement~~The working principle of the module: (1) Use IO to trigger ranging, and give a high level signal of at least 10us; (2) The module automatically sends 8 square waves of 40khz, Automatically detect whether there is a signal return; (3) If there is a signal return, a high level is output through IO, and the duration of the high level is the time from the launch to the return of the ultrasonic wave. Test distance = (high level time * speed of sound (340M/S))/2;Quantity: (1 piece) Ultrasonic ranging module \ other products not includedSize: As shown (for reference only)Color as shownNote, because there may be color and size difference between the light effect photo and the actual product, please allow 1-2 cm error