The ultrasonic module works at a distance range from 3 to 400 cm. The maximum deviation in this regard is just 0.3 millimetres. This module is also ideal for mobile use thanks to its compact size and high-quality finish. - Range: 3 to 400 cm - Operating voltage: 5 V DC - Frequency: 40 kHz - Trigger pulse width: 10 µs - High measuring accuracy (maximum deviation: 0.3 mm) Dimensions: 43 x 20 x 15 mm https://elecena.pl/product/9696363/developer-boards-ultrasonic-distance-sensor-hc-sr04 2017-08-05 https://elecena.pl/product/9696363/developer-boards-ultrasonic-distance-sensor-hc-sr04 2018-01-25 https://elecena.pl/product/9696363/developer-boards-ultrasonic-distance-sensor-hc-sr04 2026-03-03