Voltcraft-PM-37-USB (Universal Serial Bus)-Power-Meter-VOLTCRAFT-PM-37-P-The-Voltcraft-PM-37-is-a-Digital-H&-Multimeter-that-enables-a-quick-&-easy-measurement-of-the-interface-voltage-&-the-current-consumption-of-the-connected-USB (Universal Serial Bus)-device-P-P-The-power-meter-is-simply-inserted-between-the-USB (Universal Serial Bus)-interface-of-one-device-&-the-USB (Universal Serial Bus)-port-of-the-other-device-P-P-The-display-switches-between-voltage-&-current-display-The-power-meter-can-be-applied-to-any-USB (Universal Serial Bus)-port-The-data-lines-are-unaffected-P-VOLTCR