I bought a Rossmax and a cheaper one from a China platform. Rossmax mimics the reading of the doctor’s equipment consistently. Clear readings in the middle of the night.

Very good experience. Excellent follow up service. Speedy delivery. Product as described.

Not the cheapest Oximeter, but it has an added feature of determining blockage, which other meters doesn't do.

It worked as it should. Fulfilled the function as stated in the product description.

Bought it mainly for O2 reading. Convenient for quick reading. Small and light.

Seller was also very prompt in following up on delivery calling to check that I’ve received the item.