The HY1627 is the flagship model in our product line, boasting its dual frequencies of 1.8MHz and 3MHz. The 1.8MHz frequency is optimized for high-resolution, long-distance navigation, target detection, and obstacle avoidance. On the other hand, the 3MHz frequency excels in providing ultra-high-resolution sonar images for close-range applications, even surpassing the capabilities of optical imaging in turbid water environments.