A USB Data Blocker is an inconspicuous piece of hardware that looks like a USB stick itself. The device ensures that unauthorized data is not withdrawn when charging the smartphone or other mobile end devices.
For example, if you use public transport or visit a restaurant, you will often find charging options for your smartphone. This is exactly where you should protect yourself, because it is technically possible for data to be read from the connected device. Before you connect your device for charging, connect the charging cable to the USB Data blocker and only then do you connect your device to the actual charging source. This is technically realized by simply missing the data pin on the USB Data blocker. As a result, no unwanted data leakage can occur and you cannot catch malicious software such as viruses, worms or Trojans.
USB Data Blocker – Link to Amazon