1. Delivery takes 57 days from China to Korea (I was angry but the seller took care) 2. Very very difficult to remove AAA batteries. Case design is wrong. Put in new batteries if possible 3. Cannot turn off the alarm sound. The sound is very loud. 4. Reacts to DC. Especially the power (SMPS) output line. Common line does not respond during single-phase 220v input (normal operation)
I received this product in a slightly damaged condition as shown in the photo. The quality of the product's finish should have been improved or the packaging should have been made stronger.
In the general situation where hot wire and neutral wire are close, this product cannot distinguish between the two wires. Sensitivity adjustment is difficult. You can use it for fun, but I don't recommend using it in real work.