will this work without air hose attached to decrease air?

Good Morning, This will let the air out if attached without an air supply but it will not give an accurate reading of what the tire pressure is because there wouldn't be the air supply trying to go into the tire. Rodney DeHaan Unique Truck Equipment

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Automatic Handheld MHA-100

Product ID: 374180039

Details

Brand
Martins
Item Weight
2.6 Pounds
Item dimensions L x W x H
12.75 x 3.75 x
Material
Acrylonitrile
Thread Type
Npt

⚡Rechargeable battery powers 500+ inflations

📏Up to 174 PSI precision pressure control

🔊Loud audible alert signals pressure reached

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NZ$945

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗 Inflate Like a Pro, Anywhere, Anytime!

LONG LASTING POWER - Rechargeable lithium-ion battery delivers up to 500 inflations per charge—ready whenever you are.
UNIVERSAL COMPATIBILITY - Works seamlessly with cars, trucks, bikes, e-bikes, and motorsports gear via standard ¼'' NPT air compressor outputs.
VERSATILE PRESSURE UNITS - LED backlit display supports PSI, KPA, Bar, and Kg/cm² for global compatibility and professional accuracy.
DURABLE LIGHTWEIGHT DESIGN - Rugged ABS casing protects against drops and scratches while remaining ultra-portable for on-the-go use.
EFFORTLESS PRECISION INFLATION - Automatically inflates or deflates tires to exact pressure, eliminating guesswork and saving time.

The Martins Industries Flatematic Handheld Automatic Tire Inflator offers professional-grade tire inflation with up to 174 PSI capacity, automatic inflate/deflate functionality, and a rechargeable lithium-ion battery capable of 500+ uses per charge. Featuring a durable ABS case, an LED backlit multi-unit display, and a loud alert system, it ensures precise tire pressure maintenance for a wide range of vehicles, making it an essential tool for efficient, on-the-go tire care.

Specifications

ASIN	B09GBHBPZ4
Best Sellers Rank	#286,749 in Automotive ( See Top 100 in Automotive ) #742 in Wheel & Tire Air Compressors & Inflators
Brand	Martins Industries
Brand Name	Martins Industries
Customer Reviews	4.2 out of 5 stars 49 Reviews
Included Components	Handa Tools
Item Dimensions	12.75 x 3.75 x 3.25 inches
Item Type Name	Hand Tools
Item Weight	2.6 Pounds
Item dimensions L x W x H	12.75 x 3.75 x 3.25 inches
Manufacturer	Martins Industries
Material	Acrylonitrile Butadiene Styrene (ABS)
Material Type	Acrylonitrile Butadiene Styrene (ABS)
Model	MHA-100
Number of Items	1
Part Number	MHA-100
Thread Style	Npt
Thread Type	Npt
UPC	689394095320
Unit Count	1.0 Count
Voltage	12 Volts

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