Just check coupons out (with price alert and history). What is the best price?
SpO2 range: 70-100%, Pulse rate range: 25-250 BPM, Power consumption: less than 30mA, +/- 2%, Display method: OLED display, +/-1 BPM, Size: 58*32*34m
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Check out price history chart (for all/most countries) for Yuwell YX301 Fingertip Pulse Oximeter.
Price records source(s): Gearbest
Click on image to enlarge.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).