What is the fine-grained topic of the following text: With dual frequency capabilities and still weighing less than 400g in water, the Oculus M1200d provides stunning imagery at both 1.2MHz and 2.1MHz with ranges up to 30m making it ideal for specialised inspection tasks where image quality is critical. Only return the topic.
Dual Frequency Capabilities of the Oculus M1200d for Specialised Inspection Tasks