This meter is a small tool for the engineer, electronic maintenance and factory. It is very easy to test plug-in and SMD devices, also can test different kinds of diodes, triodes, thyristors, MOSFET, enable to analysis the device type, the polarity of the pin, the output HFE, the valve voltage, the junction capacitance of the FET. Specification: Brand: BSIDE Model: ESR02 Pro Resistor: 0?~50?, Resolution: 0.01 ohm Capacity: 25pF~100mF, Resolution: 1pF Inductance: 0.01mH~20H, Resolution: 0.01mH Capacitor ESR Resolution: 0.01? Battery: 1pcs x 9V 6LR61 Battery (NOT included) Size: Approx. 14*8*4.5cm/5.5*3.1*1.8inch Weight: Approx. 223g / 7.9oz Using Instruction: Push "POWER / TEST" to power on and start a test, multiple measurements can be repeated by this key, auto power off 20 seconds after measurement. Provide three kinds of socket, each socket pin 1, pin 2 and pin 3 are connected. The placement of the device does not require the order of instruction, and the screen displays the component function of each pin after measuring. There is a table "typical ESR value of electrolytic capacitor" at the back, it is for guiding only, these are typical value for standard grade electrolytic capacitor at room temperature. Package List: 1 x Transistor Tester 1 x User Manual Note: Before testing the capacitor, be sure to discharge it, otherwise it may damage the internal circuit. If using DC supply, please choose DC 9V~12V adapter. (including 9V and 12V) Can be powered by a 9V 6LR61 battery (NOT included) , when the battery power is under 6V, please replace a new one.