For a daily dose as low as 2000 IU this is not going to be a concern for adults, especially when taken with a meal. Generally for avg+ weight males, even 5000 IU with a large meal is not going to cause issues with hypercalcemia.

Look to avoid added calcium in multivits first. Women and those concerned with bone health should supplement with boron instead. Dietary calcium should be more than enough in typical diets. The only calcium containing supp i might take would be calcium ascorbate (it's a fairly small dose of calcium).

Having wattage emitted in RF bursts 2mm from your head is never a good idea (yup, i wholly approve of avoiding this: "2. Sony noise reduction headphones").