does this work on Christmas lights

Yes, that is what I bought it for.

my tester quit after using for three days changed batteries the flashlight comes on and wont go off tester wil not work

Thank you very much for your feedback on using the DB03 product. Your information is very important to us. If you encounter the fault you mentioned, you can try the following operations: 1. Check whether the safety key is stuck and whether other safety key functions can work normally; 2. Check whether the battery size is too large, which may cause internal structure deformation; 3. After confirming the above two points, you can try to turn off and restart the device.

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ZT-DB03 Voltage Tester with Ambient Temperature Display, Non-Contact Voltage Tester, Multi-Range Test Pen, Live/Null line Tester, Electric Tester with Flashlight, Break-Point Detector.

ZT-DB03 Voltage Tester with Ambient Temperature Display, Non-Contact Voltage Tester, Multi-Range Test Pen, Live/Null line Tester, Electric Tester with Flashlight, Break-Point Detector.

Product ID: 593730287

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Details

Brand
ZOTEK
Power Source
Battery
Style
Compact
Colour
Red
Item dimensions L x W x H
15.6 x 2.3 x

⚡Non-contact AC voltage detection up to 1000V

🔦Built-in LED flashlight for low-light environments

🌡️Ambient temperature display for versatile diagnostics

Description

⚡ Stay ahead of the current—test smarter, safer, faster!

SMART AUTO SLEEP MODE - Maximize battery life with automatic shutdown after 15 minutes of inactivity—ready when you are, always energy-efficient.
COMPACT PORTABLE DESIGN - Lightweight 59g body with secure clip fits perfectly in your pocket or toolkit for on-the-go professionals.
NON CONTACT SAFETY DETECTION - Stay safe with automatic live/neutral line detection and audible-visual alerts that keep you informed without direct contact.
CE CERTIFIED SAFETY ASSURANCE - Certified CAT II 1000V compliance guarantees reliable performance and peace of mind on every job.
PRECISION DUAL RANGE VOLTAGE TESTING - Switch effortlessly between 12V-1000V and 48V-1000V modes for pinpoint accuracy in any electrical scenario.

The ZT-DB03 Voltage Tester is a compact, battery-powered non-contact electrical tester featuring dual-range voltage measurement (12V-1000V and 48V-1000V), ambient temperature display, and a built-in LED flashlight. Designed for electricians and homeowners alike, it offers live/neutral line detection with audible and visual alerts, automatic sleep mode for energy efficiency, and meets CE CAT II 1000V safety standards. Its lightweight, pocket-friendly design ensures convenience and reliability across diverse electrical testing tasks.

Specifications

Brand	ZOTEK
Power Source	Battery Powered
Style	Compact
Colour	Red
Item dimensions L x W x H	15.6 x 2.3 x 2.8 Centimeters
Min. Operating Voltage	12 Volts
Specification Met	CE
Measurement Type	Voltage Tester
Maximum Operating Voltage	1000 Volts
UPC	787309234625
Manufacturer	ZOYI
Country of Origin	China
Model number	ZT-DB03
Number of Memory Sticks	1
Item Weight	59 g
Product Dimensions	15.6 x 2.29 x 2.79 cm; 59 g
Batteries	2 AAA batteries required.
Item model number	ZT-DB03
Item Height	1.1 Inches
Item Width	0.9 Inches
Included Components	Non-Contact Test Pen User Manual
Are batteries included?	No
Lithium Battery Packaging	Batteries only

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