- If you want to know if the charger you bought is original or not. - If you want to know if the real voltage and amperage entering your phone are correct or not. - If you want to know the alternating current entering your laptop. - If you want all this information and more to be available on your phone or laptop. - If you want to know the current and amperage entering and leaving the power bank (portable charger) as written in its specifications or otherwise.. * This device does all of the above and can be connected to your phone or laptop via Bluetooth.. // Please contact privately // Price 65 SAR