Basically copy coupon, view price history or create e-mail price alert. What is best price?
Transmission frequency 433.92MHz, Working voltage 2.0 – 3.6V, Battery built-in CR1632 button cell, Pressure unit psi / bar, Transmission frequency 433.92MHz, Working pressure 0 – 99 psi, Working environment -40 – 125 Deg.C, Working voltage 5V, Waterproof grade IP67, Temperature unit Deg.C / Deg.F, Battery type 280mAh Li-ion battery, Pressure accuracy plus or minus 1.5 psi, Working environment -40 – 85 Deg.C
Aliexpress
There’re some similar (or not) items on Aliexpress
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Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG29d711, BG88c0f3, BG5db0fa, 8BGwbg2204, BG4964af, BGb3fcb2, tRaDetRaCKeR, BGab72f6, BG11d05b, BGAUTO22, BGdcbfa8, BG40768d, BGSCM75, BG0fd7ab, BG170449, BGSCM11
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for C-260 Car Tire Pressure Monitoring System.
Price records source(s): Banggood
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)).