Description: What's the difference between 3 versions? T7 / TC1: color screen, two functions are the same! T7 is slightly faster! The TC1 screen is slightly larger and they are all powered by lithium batteries. In addition to measuring resistance, capacitance, inductance, diodes, MOS transistors, thyristors, it can also measure additional voltage regulators, infrared decoding (limited to for Hitachi format) T7H: is an upgraded version of T7, Up-to-date / fastest version TC-T7-H 128x128 TFT display Multi function key Transistor test area Zener Diode test area IR receiver window Micro USB Charging Interface Charge indicator LED Features: TC-T7-H is a TFT graphic display Multifunction Tester. Transistor Tester: Automatic detection of NPN and PNP bipolar transistors, N-channel and P-channel MOSFETs, JFETs, diodes (including double diodes), N- and P-IGBTs, resistors (including potentiometers), inductors, capacitors, thyristors, triacs and battery (0.1-4.5V) Automatic detection of zener diode(0.01-20V) Self test with automatic calibration IR decoder: Support Hitachi IR coding IR waveform display Infrared receiving instruction Other: Measurement results using TFT graphic display(160x128) One key operation Auto Power Off(Timeout Settable) Built-in high capacity rechargeable Li-ion Battery Li-ion Battery voltage detection Support Chinese and English Performance Parameters: Multifunction Tester can automatically identify elements and automatic detection of pin layout, and automatic switching range. The main performance parameters are as follows: Component Range Parameter Description BJT - hFE(DC Current Gain), Ube(Base-Emitter Voltage), Ic(Collector Current), Iceo(Collector Cut-off Current (IB=0)), Ices(Collector short Current), Uf(Forward Voltage of protecting diode) Diode Forward Voltage