Altitude: <2000 meters, Measuring voltage accuracy: ± (2% + 5), Working hum heart ty: 20% -75% RH, Working voltage / measuring voltage range: 90-250v / 45-65Hz, RCD current: > 30mA, Working temperature / 0-40 ° C, Whole machine working current: <3mA (not in RCD status), LCD operating voltage: 220v ± 20V, Storage temperature: -10 ~ 50 ° C, Storage humidity: 20-80% RH.
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.
Updated: 04-07-2025
Banggood
Warehouse in China.
Link: Mustool MT10S MT10E Socket Outlet Tester
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons:
1. First page
2. Second page
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Mustool MT10S MT10E Socket Outlet Tester [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for Mustool MT10S MT10E Socket Outlet Tester is here. The lowest price was: $7.99.
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)).
.