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In this video, I present a very accurate digital meter designed for the European 230 Volt mains and socket, which can be controlled via Bluetooth from your mobile phone.
It measures the input mains voltage and its frequency, the current and the real power of the consumer, and the power factor (cos fi).
My measurements show how accurate this small non-laboratory household instrument is.
I recommend it to everyone because it can be used to detect devices that significantly increase electricity bills.
You can buy it at Banggood at the link below, I bought it there.
www.banggood.c...