$25.99 – Size 6.14 inch*2.17 inch*0.94 inch, Name Brake Fluid Tester, Test Range DOT3、 DOT4、DOT5.1, Model BF200, Color Gray and black, Battery 2 pcs AAAA batteries (not included), Material ABS, Temperature -10°C~50°C, Display High resolution screen.
When I was updating this page the price was $25.99 for 12V Auto Brake Fluid Tester (in Banggood). Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($25.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Low/high price? From what I can see this price is higher than average price ($19.66).
Link: Banggood product page
Price: $25.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGf475ef, BGSCM75, BGf6b5cc, BGSCM11, BG6aefd2, BGCRT313, BGAMMT03
(these coupons are old, so probably won’t work)
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.
Price history and price alert
Do you need price history chart (for all/most countries) for 12V Auto Brake Fluid Tester? There we go. The lowest price was: $17.99.
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)).