Emission current: 1 – 6.6mA, Battery power: 500mAh, Working voltage: 2 – 3.6V, Working frequency: 433MHz, Working current: 1A, Power supply: solar power / USB, Wireless connection: Bluetooth V4.2, Working temperature: -40 – 125 Deg.C, Working voltage: 5V, Air pressure range: 0 – 8Bar, Working temperature: -20 – 70 Deg.C.
Check coupons or create price alert down below. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($59.49): BGAnniversary
2. ($59.49): AM15prime
3. ($61.59): BgAuMotor
4. ($61.59): b71c67
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): 27183c, 4a8254, e2bcea
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Xiaomi 70mai TPMS Tire Pressure Monitor System is here. The lowest price was: $59.49.
Price records source(s): Gearbest, 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)).