Features: 1. Dual-mode power supply: the multimeter has two independent power supply systems, prioritizing the use of lithium battery power supply, such as detecting lithium battery power depletion, it will automatically switch to dry battery emergency power supply 2.LCD color screen display: high-definition color screen display in sunlight and darkness can be seen clearly, the digital display up to 9999 counts, the larger the count, the higher the accuracy, for you to measure is not limited! 3. Multi-functional composite multimeter: S30 = digital multimeter + infrared thermometer + pen + circuit analyzer 4.High-voltage diode test: high-voltage diode mode can be lit up to 15V light-emitting diodes, so as to quickly determine the good and bad, covering more than one type of diode test, such as rectifier diodes, voltage regulator diodes and so on. 5. Scenarios: lighting industry, electronics and electricians, home maintenance, automotive maintenance, etc. 6. Function details: AC and DC current, true RMS, maximum screen, DC voltage, AC voltage, infrared temperature measurement, resistance, diode, frequency, beeping on and off, high voltage diode, flashlight, automatic identification, dual power supply system, firewire identification, rechargeable batteries, capacitors, non-contact sensing, LCD color screen, low battery alarm! Specification: Model: S30 Maximum count: 9999 Color: eblack/red/green Battery and power supply: built-in 1100mA 3.7V lithium battery DC Voltage: 0~620V(DC Mode) 0.5~620V(Auto Mode) AC Voltage: 0~620V(AC Mode) 0.8~620V(Auto Mode) Resistance:0.0~9.999