A great little multi-function component tester! Drop the component and hit start and it will automatically recognize the type of component and give a few measurements.
-Self test with automatic calibration
-1/8" color display
-Diode Range: less than 4.5V
-Zener Diode:Transistor Detect Area: 0.01-4.5V
-Zener Diode Detect Area: 0.01-30V
-Power: Built-in Rechargeable Lithium Battery via micro-usb (micro USB to USB type A cable included)
*Not recommended for germanium transistors, but will get you in a very rough ballpark most of the time.*