I started my own Coronary Rehab here at home. Soon discovered that I needed something to monitor my pulse. Having spent several weeks in the ICU in three different hospitals. I was familiar with those finger tip devises. Found them at "Berovan Marketing" on the North Hwy. It is called "Fingertip Pulse Oximeter" cost ₱4,500.oo. Found a knee brace there also.
Oh my, 4500php for a pulse oximeter!! I had brought one from the states with us, but purchased another on Lazada, I think for around 600 php, maybe less. I think you may have way overpaid. I am glad you have one, though, if you need it. If you were just needing to check your pulse, it is easy and free to do yourself. The pulse oximeter is a great tool, though, for showing your oxygen level, which, if you are having heart or lung issues, is a great thing to keep an eye on!