Model 20 Telecommunication Tool Set Material Carbon Steel Quantity per Package 20 Telecommunications Scope Weight 1.5 (kg) Instructions for using the digital display electric pen: Dear, if you don't know how to use this electric pen, please read the following use method carefully: Product features: No need for a battery reader, practical and economical; Can directly or indirectly measure 12V-220V AC / DC; How to use: The detection range is 12V-220V AC / DC Press the "Direct test" button, the metal tip of the electric pen touches the object to be measured. The electric pen has five voltage values: 12V, 36V, 55V, 110V and 220V. The final value on the LCD display is the measured voltage value. (When the display value of the highest segment is not reached 70%, the value of the lowest segment is displayed); When measuring ungrounded direct current, touch the other electrode with your hand. Induction detection: Press the "Induction, Breakpoint Test" button and the metal tip of the electric test pen is close to the object to be tested. If the "lightning" symbol appears on the screen, it means that the object is alive; When measuring a disconnected wire, press the "induction, break point test" button and the metal tip of the electrical test pen is close to the outer insulating layer of the wire, and the "lightning bolt" symbol "appears, indicating that the measured point is supplied with alternating current. In the event of a line break, the lightning symbol disappears when the power is cut. Use this function to easily distinguish zero and phase lines (distance between lines should be increased when measuring parallel lines). Please allow slight deviation in the measurement data and make sure you do not mind before ordering. High quality store for you Tips from the store: 1. The size is manually measured, please allow the error (1-3cm). 2. Due to the different monitor pixels, there may be some color difference, please refer to the actual product.