Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – RUIDENG UM24 Voltmeter Ammeter (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (17.85 USD): BG589b2e
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): tps6786, BGVDay10%off, BGRUMB15, BGAFF10OFF, BGCuponation10, BGHONEY2110, 13f142, BG2589f4, 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, MVC8SPRING, BG19fa32, Cuponation9
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – RUIDENG UM24 Voltmeter Ammeter (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for RUIDENG UM24C Voltmeter Ammeter.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).