ZnDiy-BRY MESR-100 1.9'' LCD Auto-Ranging Electrolytic Capacitor ESR Meter - Black + Yellow
Accuracy: Up to 1%; High Resolution: 4 digit or 0.001Ohm at 1 Ohm range; Measuring voltage: <~40mV RMS (TESTING VOLTAGE); Clamping voltage: 0.15V (open voltage); Battery 2 x AA 1.5V battery; External Power: 5V micro USB; Operating current: 0.02A; Battery Life time: >80 Hours.