About Ultrasonic Range Sensor module:
- This performance of the ultrasonic sensor distance measuring module is stable, measure the distance accurately. The module is with High precision, blind spots (3cm) super close. This module provides a full set of ranging process.
- Arduino library ready: HCSR04Ultrasonic
- Model: HC-SR04P
- Operating voltage: 3~5.5VDC
- Static current: Less than 2mA.
- IO logic voltage: 5V.
- Sensor angle: Not more than 15 degrees.
- Detection distance: 3cm~400cm.
- Accuracy: 3mm
- Adopt IO trigger through supplying at least 10us sequence of high level signal
- The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal
- If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving.

About 4-Digit Display module
- The module is based on a decimal point display module, it displays four digital tube (0.36 inches), only two signal lines can make MCU control four Digit 8-segment LED. Can be used to display decimal, letters and so on.
- Can display the measuring distance by the ultrasonic range module.
- 8 class adjustable brightness
- Operating voltage: 3.3-5.25V
- IO logic voltage: 3.3V or 5V