uxcell LED Display USB PC Phone Battery Charger Power Current Voltage Meter Wide detecting range! Accurately show Voltage of 3.2V-10V, Current of 0A-3A. Extremely portable carry! Light weight, small size and durable, no extra cable. Plug and play! Compatible and handy, easy to carry and no need external power. Universal usage! It fits for almost everything about electronics with USB charging. Electric safety guider! Perfect to detect your phone charger or power bank to avoid overloading.