Yes, if the blood stains show a brown fluorescence color under ultraviolet light, it can be judged that there should be blood stains.

How do you get 2 AA batteries in it?

It was powered by 2*AAA batteries.

Can this test uv blocking of sunglasses?

The wavelengths range of the ultraviolet light in the sunlight is 10nm-400nm, this blacklight flashlight is 395nm. You can only use this blacklight fashlight to test if your sunglasses can block 395nm blacklight, for other wavelengths light of UV light, you need other lights.

Has anyone used these to detect Freon leaks ? Do they work for that

Yes, it can detects Freon leaks.

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COSOOS 2 UV Black Light Flashlight, 2 Pack 395nm Mini Pen Light with Clip, Waterproof Ultraviolet Flashlight for Leak, Pet Urine, Scorpion, Hotel Inspection, Dry Stain and Bed Bug.

COSOOS 2 UV Black Light Flashlight, 2 Pack 395nm Mini Pen Light with Clip, Waterproof Ultraviolet Flashlight for Leak, Pet Urine, Scorpion, Hotel Inspection, Dry Stain and Bed Bug.

Product ID: 659491959

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Details

Special Feature
High Lumens
Colour
Black
Power Source
Battery
Light Source Type
LED
Material
Plastic

💧Waterproof & shock resistant

🔋Rechargeable with USB cable

🔦800 Lumen super bright

Description

🔦 Light up your night, never miss a moment!

COMPACT PORTABLE - Mini pen light with clip for effortless carry and quick access.
RUGGED WATERPROOF DESIGN - Built tough to withstand rain, spills, and shocks on any adventure.
VERSATILE 5 MODE LIGHTING - High, Medium, Low, SOS, and Strobe modes for every situation.
ULTRA BRIGHT 800 LUMEN LED - Illuminate your world with unmatched clarity and power.
LONG LASTING RECHARGEABLE BATTERY - Eco-friendly USB charging keeps you powered on the go.

The COSOOS 2 UV Black Light Flashlight pack features ultra-bright 800 lumen LEDs with 5 versatile lighting modes, housed in a durable waterproof and shock-resistant aluminum body. Compact and rechargeable via USB, these mini pen lights are perfect for professional inspections, outdoor adventures, and emergency preparedness.

Specifications

Special Feature	High Lumens, Rechargeable
Colour	Black
Power Source	Battery Powered
Light Source Type	LED
Material	Plastic
Included Components	Usb Cable
Product Dimensions	10D x 9W x 18H Centimeters
Voltage	3 Volts
Battery Cell Composition	Alkaline
Item Weight	1.1 Ounces
Water Resistance Level	Waterproof
Brand	COSOOS
Brightness	800 Lumen
Battery Description	Alkaline
Style	compact
Finish Type	Metallic
Specification Met	FDA
Mounting Type	Handheld
Recommended Uses For Product	Indoor, Outdoor, Emergency, Camping, Hiking
Manufacturer	COSOOS
Country of Origin	USA
Item model number	uv pen light-2
ASIN	B0B92PDCSV

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TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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