Characteristics:
 
- It has a large display (3.5 inch) / ultra-thin (1.2 cm) design and intelligent identification capabilities.
- It is an essential tool in your life and work, also suitable as a gift for elders, friends and children.
- When measuring voltage and non-contact voltage, the intensity of the measured voltage is displayed by the indicator. Visually it brings us a better experience.
- 3.5" large 3-line LCD can show 3 test results on screen, such as voltage, frequency and analog bar. Ideal for home, school or laboratory use, etc.
- Intelligent technology makes this multimeter can automatically identify the tested parameters and choose their required range.
- Probe design multimeter allows you to test safely and efficiently, no need to plug and unplug probes, which not only saves learning and testing time, but also prevents incorrect plugging of ports.

Technical specifications:
 
Automatic measuring range.
Overload protection of the entire measuring range.
Maximum allowable voltage at measurement: 600V DC or 600AC (RMS)
Working height: maximum 2000m 
Display: LCD
Maximum display value: 9999 digits
Polarity Indication: Self-indication, "-" means negative polarity
Out of range display: "0L" or "-0L" 
Sampling Time: The meter digits show about 0.4 seconds 
Unit display: Battery unit display and function
Auto shut-off time: 3 minutes 
Operating power: CR2032 battery x 2
Low Battery Indication: LCD displays a low battery symbol
Temperature Coefficient: Less than 0.1x Accuracy/°C
Operating Temperature and Humidity: 0~40°C / 32~104°F  , 45%-80%RH
Storage temperature and humidity: -10 - 60°C / -4 - 140°F, 45%-80%RH
Limit size: 136x67x12mm
Weight: 110g
Backlight: TN screen version short press the light button to turn on the backlight / VA screen version with automatic wake-up, 15 seconds automatic standby mode.

RangeExplanation
Low-rangeGreen voltage signal indicators An analog 1/3 bar, the buzzer, is displayed on the screen
sounds a slow alarm.
Mid-rangeYellow voltage signal indicators. The screen displays 2/3 analog bar, the buzzer
sounds a rapid alarm.
High rangeRed voltage signal indicator Screen displays full analog bar, buzzer
a very loud alarm sounds.

DC voltage600V / 0.1V±(0.8% + 3)min input voltage: 0.5V
maximum input voltage:
input impedance 600 V:10M.
AC voltage600V / 0.1V±(1.2% + 5)min input voltage: 1
V maximum input voltage:
input impedance 600 V:10M.
Resistence1Ω-10M(1.2% + 3)250V AC/DC overload protection
Capacity1000uF / 0.1uF(3.5% + 8)Minimum measurement capacitance 0.5 uF
Overload protection 250 v AC / DC
6000uF / 1uF(4.5% + 10)
Frequency10HZ-1000HZ(2% + 10)RMS above ACV1V
Maximum display value9999
Automatic shutdown√
Electric torch√
Diodeautomatic identification of diode below 1.0V.
Buzzer√
NCV extension
(non-contact voltage detection)		√
wire tension check√
Undervoltage warning√

 
Package Includes:

1 x Smart Digital Multimeter
1 x ferrule
1 x user manual
MUSTOOL MT99PRO Dual-Mode Voltage Detection Intelligent True RMS Multimeter Voltage Detection Indicator Auto Range Detection with Ultra-large EBTN LCD Screen
 
Details pictures:
 









- When measuring voltage and non-contact voltage, the intensity of the measured voltage is displayed by the indicator. Visually it brings us a better experience. - 3.5" large 3-line LCD can show 3 test results on screen, such as voltage, frequency and analog bar. Ideal for home, school or laboratory use, etc. - Intelligent technology makes this multimeter can automatically identify the tested parameters and choose their required range. - Probe design multimeter allows you to test safely and efficiently, no need to plug and unplug probes, which not only saves learning and testing time, but also prevents incorrect plugging of ports. Backlight: TN screen version short press the light button to turn on the backlight / VA screen version with automatic wake-up, 15 seconds automatic standby mode.
- When measuring voltage and non-contact voltage, the intensity of the measured voltage is displayed by the indicator. Visually it brings us a better experience. - 3.5" large 3-line LCD can show 3 test results on screen, such as voltage, frequency and analog bar. Ideal for home, school or laboratory use, etc. - Intelligent technology makes this multimeter can automatically identify the tested parameters and choose their required range. - Probe design multimeter allows you to test safely and efficiently, no need to plug and unplug probes, which not only saves learning and testing time, but also prevents incorrect plugging of ports. Backlight: TN screen version short press the light button to turn on the backlight / VA screen version with automatic wake-up, 15 seconds automatic standby mode.