I had bought this immersion rod, as I needed something like this, and had been using this product for at least 1.5-2 months, but then I had to Dispose it, because of following few reasons.
Firstly, when the plug was socketed, it gave a Sudden Spark, often due to Short-Circuiting issues. It was bit dangerous to handle.
Next, the Insulation was so so Poor, that often holding the insulation part would make us Feel the Shock or Heat at the handles.
Also, it gave rise to smoke, when put under water, and was horrible in its functioning.
Due to this Malfunctioning, it had to be Discarded.