Household Tool Set Model 9 Pieces Carbon Steel Material Applicable Scope Household Weight 1.5 (kg) Size 16 * 16 * 8 Instructions for the use of the electric pen with digital display: Cher, if you do not know how to use this electric pen, please read carefully the following method of use: Product characteristics: no need for battery, practical and economical reader; can measure directly or indirectly 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 screen is the measured voltage value. (When the highest display value of the segment is not 70% reached, the value of the lower segment is displayed); When measuring the continuous current not connected to the ground, touch the other electrode with your hand. Induction detection: Press the "Induction, Stop Stitch Test" and the metal tip of the electrical test pen is close to the object to be tested. If the "Flash" symbol appears on the screen, it means that the object is alive; When measuring a disconnected wire, press the "Induction, break point test" and the metal tip of the electrical test pen is close to the insulating outer layer of the wire, and The "flash" symbol appears, indicating that the measured point is powered by alternating current. In case of breakage phenomenon, the "flash" symbol disappears with the power failure. Use this function to easily distinguish zero and phase lines (the distance between the lines must be increased when measuring parallel lines). Please allow a slight deviation in the measurement data and make sure it does not bother you before ordering. High quality store for you