Transistor Detection: After the power-off state or test is completed, put the test component into the transistor test area of the test socket, press the lock handle, press the multi-function key, the tester automatically measures, and the measurement result is displayed at of the test. Warning: We do not recommend using a tester to measure the battery! The battery voltage must be less than 4.5V, otherwise the tester may be damaged! Feature: Automatic detection of zener diode 0.01-30V. Self test with automatic calibration. Support IR coding. IR waveform display. Infrared receiving instruction. Measurement results using TFT graphic display. One key operation. Auto power off (timeout settable). Built-in high capacity rechargeable Li-ion battery. Li-ion Battery voltage detection. Used to detect NPN and PNP transistors, capacitors, resistors, diodes, transistors, N-channel and P-channel MOSFETs, IGBTs, JFETs, triacs and batteries Specification: Sweep range: 0.1MHz Voltage: 3.7V Display: 160 * 128 TFT Battery: 1 * Li-ion battery, 3.7V, 300mAh Colour: as shown Material: ABS Package Contents: 1 x Transistor LCR-TC7 Tester Only 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.