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Description
KT4H 0-330V LED TV Backlight Tester with Auto Voltage - Portable and Convenient Tool for TV RepairThe KT4H LED TV Backlight Tester is a portable and convenient tool for testing LED backlit TVs and computers. It can handle loads up to 330V, making it compatible with most TV models. The KT4H can help you easily spot faulty LEDs, saving you time and money on repairs. These can also be used to diagnose faulty LED modules used on modern cars making them ideal for Car service technicians as well. Features: Suitable for use with most TV's, Monitors or
The KT4H LED TV Backlight Tester is a portable and convenient tool for testing LED backlit TVs and computers. It can handle loads up to 330V, making it compatible with most TV models. The KT4H can help you easily spot faulty LEDs, saving you time and money on repairs.
These can also be used to diagnose faulty LED modules used on modern cars making them ideal for Car service technicians as well.
Features:
- Suitable for use with most TV's, Monitors or Laptop displays that utilise LED backlighting.
- Real-time testing voltage and constant current drive board.
- Test LED strips, LED panels, single LED bead, COB lighting sources and so on.
- Test backlights of LED TV, displays, computers and so on.
- Compatible with all the LED strips (high voltage or low voltage).
- Manually adjustable testing voltage range (20-330V/DC) and current (20-150mA).
- Adjustable voltage at open circuit (without loads) and adjusting current with loads or contact probes together.
- No burn out when testing single LED bead with wrong polarity. (Set voltage around to 20V and the current switch to 1mA)
- Test voltage parameters of various of electronic components.
- Test LED lights on vehicles.
Specifications:
- Suitable for use with most TV's, Monitors or Laptop displays that utilise LED backlighting.
- Product model: KT4H
- Voltage input: AC 85-265V
- Voltage output: DC 0-330V (Automatic + Adjustable)
- Voltmeter Accuracy: < (± 0.5 ± 1%Vout) V
- Amperage output: 0-150mA (Automatic + Adjustable)
- Constant Current Board Testing Current: 0-999mA
- Ammeter Accuracy: <(±2 ±1%Iout) mA
- Pinput: 50VA (MAX)
- Operating Temperature Range: -20℃~+40℃
- Package contains: 1x KT4H Tester, 1x Mains Lead, 1x Constant Current Cable, 1x Constant Current Clip Cable, 1x Pair 20A Test Probes, User Manual
Testing Methods:
- Default factory setting: Output Voltage 330V, Output Current 30mA. You can testing the backlight of TV with any size at this default settings.
- Self-testing: Plug in, turn the power switch on. The voltage is around 330V, current is 0; Contact the probes together, voltage changes to 0 and current changes to around 50mA, then testing can be started
- In testing: Voltage = ‘0’, SHORT CIRCUIT. Voltage = ‘330V’, OPEN CIRCUIT.
- Testing single LED bead (Set voltage around to 20V and the current switch to 1mA):
A. With right polarity: the voltage shows on the tester of a normal LED bead is about 80% of the rated voltage, for example, the operating voltage of the LED bead is 2.4V if its rated voltage is 3V;
B. With wrong polarity: Voltage display the open circuit voltage. - Testing LED strips: Set the voltage to around 200V, change the current if need adjust brightness.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 4
Bathroom
Color: Gold Polished
Nice looking and heavy. I am using it in the bathroom for paper towels for guests.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
★★★★★ 5
Love it
Color: Warm Gold, Color: Warm Gold
Great quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
★★★★★ 5
Great Brush Gold match for Delta faucets.
Color: Warm Gold
Love this paper towel holder and curtain rods. The brush gold is just as promised and perfectly matched Delta faucets.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 5, 2025
★★★★★ 5
Helps With Dry Mouth, Tastes Great and Easy to Keep On Hand
Size: 27 Count (Pack of 1), Size: 27 Count (Pack of 1)
Update: I have already repurchased more! I love the taste and they work so well with a great taste.
I’ve been dealing with dry mouth lately, especially at night, and these Biotene Dry Mouth Lozenges have been really helpful. They dissolve slowly and help keep my mouth feeling more comfortable without being overly sweet or strong.
The mint flavor is light and refreshing, which I appreciate because some lozenges can taste too medicinal. These are gentle and easy to use throughout the day or before bed if dryness is bothering me.
The packaging is also convenient to keep in a bag or on a bedside table. I like that the lozenges are sugar-free and individually sealed in the blister pack so they stay fresh.
I included a photo of the lozenge in my hand so you can see the size and what it looks like out of the package, along with photos of the box and blister pack for reference.
These are simple, effective, great taste and a good option to keep on hand if you deal with dry mouth.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
It works and nice mint taste
Size: 27 Count (Pack of 1)
Very good for dry mouth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026