UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter
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  • SKU: 86033888
  • Availability:Out of stock

UNI-T UT390B+ 40m/131ft Digital Laser Range Finder Distance Meter

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The UNI-T UT390B+ Digital Laser Distance Meter 40m/131ft Range Finder Area Volume Measurer Self-calibration Level Bubble determines distance up to 40m/131ft with accuracy of plus or minus 2.0mm. This digital laser distance meter belongs to high precision and multi-functional laser measuring instrument, which can be used to measure the distance, area and volume, and can also utilize the indirect measurement of Pythagorean theorem, ideal for use in residential and commercial design and construction projects. Self-calibration function ensures high accuracy to offer dependable results. Level bubble adds more convenience.

  • Addition and subtraction
  • Continuous measurement
  • Compact and light, easy to carry
  • Easy and safe to use, high sensitivity
  • Self-calibration function, high accuracy
  • Quickly measure distance, calculate area and volume
  • Height measurement by using Pythagorean Theorem
  • Determine distance up to 40m/131ft with accuracy of plus or minus 2.0mm
Brand UNI-T
Model UT390B+
Measuring?Accuracy ¡À2.0mm
Measuring?Range 0.05¡«40m
Measuring?Unit m,?ft,?in
Laser?Type 620¡«690mm
Laser?Class 635nm,?<1mw,?II?Clase
Single?Measurement?Time 0.25¡«4s
IP?Protection IP40
Operating?Temperature -20¡«65¡æ
Batteries 2?x?1.5V?AAA?Alkaline?Batteries (Not?Included)
Dimensions (4.41*1.97 *0.98)"?/?(11.2 *5 *2.5)cm
Material Plastic
Color Red?&?Gray
Weight 2.96oz?/?84g
Date?Storage 30?Groups
Automatic?Shutdown 150s
Continuous?Measurement ¡Ì
Area/Volumn?Calculation ¡Ì
Pythagoras?Theorem?Calculation ¡Ì
Add/Subtract ¡Ì
Length?Add/Subtract ¡Ì
Area?Add/Subtract? ¡Ì
Volumn?Add/Subtract ¡Ì
Automatic?Calibration ¡Ì
Auto?laser?Off ¡Ì
Buzzer?Indicate ¡Ì
Battery?Indicator ¡Ì
Levelling?Instrument ¡Ì
Auto?Power?Off ¡Ì
Storage?Temperature -20¡æ?~?60¡æ
Operate?Temperature 0¡æ?~?40¡æ
Relative?Humidity RH85%

Package Includes?

  • 1 x UNI-T UT390B+ Laser Distance Meter (Battery Not Included)
  • 1 x English User Manual
  • 1 x Pouch Bgs
  • 1 x Sling



Main Function



A=Power On/Measuring Key;? B=Area/Volumn/Triangle Mode Key;? C=Add/Subtract Key; D=Measuring Standard/Unit Selection? E=Storage key;? F=Power Off/Clear key?

Function 1: Automatic Calibration

  • Calibration Method: In the OFF state, keep pressing button F and button A, then power on. Release button F, screen appears "CRL", and a flashing number, automatic calibration mode start.
  • Then you can press the button C and E to calibration the meter, the accuracy is -9~9mm.

Function 2: Optical lens

  • Using top optical lens, with two photoreceptor holes. Measurement data is more accurate, more stable.

Function 3: Add/Subtract Measurement Function



  • Add measurement:

Short press the button C, screen appears"+", into Add measurement mode

  • Subtract measurement:

keep pressing button F, screen appears "-", into Subtract measurement mode

  • Area and the Volume can be added or Substracted also.

For example: Area add measurement

  • 1. Measure the first area, the result show as photo 1.
  • 2. Press button C, measure the second area, the result show as photo 2, the screen will apperas "+".
  • 3. Press the button A, get the final result.


Function 4: Measuring Reference Setting

  • Short press the button D to set the front reference or the end reference.

Function 5: HD Backlight

  • Press any button, backlight bright 15 seconds. Backlight will be auto off if no any other operation to save power.




Function 6: Anti-dropping and anti-slip.

  • Inner and outer plastic,waterproof and dustproof, 1.5m anti-wrestling, stable and durable.


Funtion 7: Pythagoras Theorem Calculation

  • Four kinds of preset instrument utilizing Pythagorean triangle unilateral measure distance mode.

Allowing users to indirect measurement in certain complex environment




Function 8: With Smooth Bubble

  • Large smooth bubble, excellent workmanship, measuring more professional.



Single Measurement:

  • During standby mode, press the button A, Laser emitting,locked measuring point. Press button A again to measure the distance.


Continuous Measurement:

  • During standby mode, keep pressing the button A, into contiunos measurement mode. Screen will appears the MAX and MIN.



Area Measurement:

Press the button B, screen will appear rectangle, one side of the rectangle will blink.

Finish the operation according to the tip:

  • 1. Press button B to meaure the first line.
  • 2.Press button B to measure the second line.

The area will be calculated automatically.

Volume Measurement:
Press twice button B, into the volume measure mode.
Finish the operation according to the tip:

  • 1. Press button B to meaure the first line.
  • 2.Press button B to measure the second line.
  • 3.Press button B to measure the third line.

The volume will be calculated automatically



We offer shipping service for all items online to most countries of the world.

Order will be shipped out in 2-7 working days normally, exculde big holidays and irresistible factors.

Shipping Methods

Orders are shipped directly from our warehouse in HK or US, in plain brown boxes with envelopes.

When in stock, Shipped on the same day; Out of stock, Shipped within 3-7 days. Orders are shipped Monday to Sunday. 

We do everything we can to make sure your order is delivered on time.

Ship From Ship To

Delivery Time

Standard Shipping Cost
United States Warehouse U.S. domestic 2-7 Free shipping
Remote Region(US) 4-11 $25.68
China Warehouse United States,Canada, United Kingdom,Spain, Australia, France, Germany, Mexico, India, Netherlands 15-30 Free shipping
Other countries 25-40

Tracked Shipping

Note: Delays may occur during this holiday season due to large volume of deliveries. This means it can take an additional 1-4 weeks in the delivery time. If you don't want to risk your orders being delayed, reply to this email within 12 hours of your purchase and let us know that you want to cancel.
You must be aware that delays can occur due to holidays and unforeseen events.

Orders are sent out through regular shipping. If you wish to have them sent with insurance coverage or through express delivery, email us first at service@dinointhebox.com before purchasing. We will give you the quotation.

Out of Stock Items

While we make every effort to keep all listed merchandise in stock, occasionally we are sold out of a certain item. If we are out of stock on an item you have ordered, we will send you an email update as quickly as possible. It will then be your choice to proceed and keep the order in place or cancel it. Items are not charged to your credit card until they are shipped.

We can not cancel your order when it's already shipped.

We use 3rd party couriers to deliver the orders. If you purchase with us you understand that there's risk of parcels getting lost. We only refund orders that have proof that they were not received.

We use 3rd party tracking systems to track orders and if the website states that your order was delivered then we will go by it. Only when the state, city or zip code from your tracking number is not consistent with your inputted shipping details, we will offer the refund. No exceptions.


If the product you received is damaged or incorrect , please contact us in a timely manner with related photos or a specific video. You could request either a full refund or a replacement item once our factory confirm that. 
Customers will only be charged once at most for shipping costs (this includes returns); No-restocking to be charged to the consumers for the return of the product.

All return requests for unwanted items must be made within 14 days of receiving the order. Kindly keep it neat and in its original packaging.
If you need to return an item, simply email us including your order number, reason for return and it would be great if related pictures could be attached. We will then provide you with instructions and a return address to ship your set back. All returned items will be inspected to see if you qualify for a refund.

You should expect to receive your refund within three weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (1 to 3 business days), and the time it takes your bank to process our refund request (3 to 5 business days).

Should you have any further concerns, feel free to email us at service@needbrightlife.com. We're here to help!