$56.99 – 1*EU Charger, 1*Type-C Charging Cable, 4*Test Clip, 1*FNIRSI SG-003A Multifunctional Signal Generator Calibrator.
FNIRSI SG-003A 0-10V Current Voltage Simulator 4-20mA Signal Generator is for $56.99 (in Banggood). You can create price alert here, copy coupons and view price history. What is the best price?
Latest coupon code price check (UTC time):
Banggood ($56.99)
Banggood warehouse is located in China. Isn’t it too expensive? According to my database, the average price is $60.99 and current price is $56.99, so it’s probably a good price! Well, there is one coupon available right now.
Link: Banggood product page
Price without coupon: $59.99
1. ($56.99): BGMAI666
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG49023, BGTools8, BGGines, BG5fd896, BGTOOS729
(you can check these old coupons out, but these 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
Check out price history chart (for all/most countries) for FNIRSI SG-003A 0-10V Current Voltage Simulator 4-20mA Signal Generator. The lowest price was: $54.99.
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)).