1x English User Manual, Package Contents: 1x Relay Tester.
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Updated: 14-09-2025
Banggood
Warehouse in China.
Link: AE100 12V Relay Tester
$15.96 with coupon: BGAutos
$16.15 with coupon: BgAuMotor
Additional Banggood coupons:
1. First page
2. Second page
Price history and price alert
Price history (for all/most countries) for AE100 12V Relay Tester is here. The lowest price was: $11.09.
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)).