1. Widely used2. Simple and convenient operation3. Beautiful appearance4. Two supply ports, -USB Type-c, supply is easier to obtain5. PP box packaging and transportation are safe and easy to storeInput voltage: 5V 1AWorking voltage: about 30mA,Transistor tester controlThe tester is controlled by a encoder switch,The encoder switch can have 6 kinds of operations in , short press, long press, left rotation, right rotation, hold left rotation, hold right rotation.In the shutdown state, short press once to turn on the and start the test.After a test is completed, if the device is not detected. Long press the switch or the left and right rotation switch to enter the function . After entering the function , the left or right rotation switch can be up and down in the item. To enter a certain function item, short press the switch once. When you need to exit from a function, press and hold the switch.Type: AMaterial: Plastic + Metalcolour: As shownPackage Contents:1 x Transistor tester English versionOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.