Can test the standing wave impedance capacitance and so onCan be connected to the computer to do antenna and other graphic analysis Specification Material Plastic metalTest frequency 1 60MSize 90mm 82mm 30mm 3 5 x 3 3 x 1 2 Connector M headNote Power supply is not included in the package You need to buy it yourself Power Requests Internal positive External negative12V Can drive the Analyzer to work but can not charge the battery 13 8V 18V Can drive the Analyzer to work also able to charge the battery Please Click Here to Download the English User Manual Package includes 1 x Antenna Analyzer the battery is not included for safety Details pictures