This is a Kirkland Signature Calcium 600 mg + Vitamin D3 supplement, with 500 tablets.
Key information
Calcium: 600 mg per tablet
Vitamin D3: included to support calcium absorption
Suggested use on the listing: 1 tablet twice daily with a meal
Bottle size: 500 tablets
Price shown: ৳4,980 (originally ৳5,500)
Claimed origin: Made in USA
Stated benefits: bone and teeth health, muscle function, and support for maintaining bone health
Dietary sources of calcium: dairy products, fortified foods, and some vegetables
One important point
The 2,500 mg/day upper limit mentioned in the description refers to total calcium intake from all sources, not necessarily the amount you should take as a supplement. If taking two 600-mg tablets daily, that's 1,200 mg of supplemental calcium alone, before counting calcium from food.
Also, calcium supplements can interact with certain medicines, and calcium absorption depends on the form of calcium and how/when it is taken.
If you tell me your age, sex, and whether you're taking any regular medicines or other vitamin/mineral supplements, I can explain whether this particular 600 mg + D3 product and the listed two-tablet dose make sense for you.