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, enable to analysis the device type, the polarity of the pin, the output HFE, the valve voltage, the junction capacitance of the FET. Features: A key operation, boot test, a key to get. Large LCD display with backlight function for easy reading. Automatically test the pin elements and display them on the LCD. Automatic detection of components such as NPN, PNP bipolar transistors, N-channel and P-channel MOSFET, diodes (Including double diodes), thyristors, transistors, resistors and capacitors, etc. Can detect transistor emitter forward bias voltage, MOSFET protection diode and amplification factor reference. MOSFET gate threshold voltage and g ate capacitance measurement. Specification: Brand: BSIDE Model: ESR02 Pro Resistor: 0Ω~50Ω, Resolution: 0.01 ohm Capacity: 25pF~100mF, Resolution: 1pF Inductance: 0.01mH~20H, Resolution: 0.01mH Capacitor ESR Resolution: 0.01Ω Battery: 1pcs x 9V 6LR61 Battery (NOT included) Color: black Size: Approx. 14*8*4.5cm/5.5*3.1*1.8inch Weight: Approx.214g/7.5oz 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. Calibration: Short the test pin 1, 2, 3 together and push "POWER / TEST" button, then the screen prompts to enter calibration, push the button again within 2 seconds to confirm. Few seconds latter the screen prompts to release pin 1, 2, 3, release them and wait for calibration finish. 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.