$29.99 – that is current price with coupon for Solar Power Wireless Tire Pressure Monitoring System (in Banggood). Check coupons or create price alert down below. Best price?
Solar Power Wireless Tire Pressure Monitoring System 6-Wheel External TPMS Tire Detector for Truck Bus Lorry
Latest coupon code price check (UTC time):
Banggood ($29.99)
Banggood warehouse is located in China. Is it cheap? Awesome! This price is the best in CouponsFromChina database! Only one coupon available!
Link: Banggood product page
Price without coupon: $38.99
1. ($29.99): BG4fa39f
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAMMT03
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Solar Power Wireless 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)).