I see reviewers make reference to audible warning. Does that mean it provdes an increasing tempo of beeps as you approach the torque you've set?

The beep will increase temp as it reaches the target torque limit. Once it is reached, it will provide a constant beep sound to notify it has reached.

Can I use it as a torque wrench?

Yes. As long as you have the room for it. A little clumsy for torque over 100 ft. lbs.

The manual says the power button should not be pressed with torque applied. I accidentally did that. Will it cause accuracy problem?

I am pretty sure that the device on start up takes a reading from the strain gauge in the device and whatever that reading is defines that value as zero torque applied. Same thing with digital scales in the kitchen, on startup they determine what zero mass/weight is. Whatever reading/torqued applied will be wrong, if a load was applied on startup.Once off power the device on with no load and I believe you will be in business again.

I don't see in specs the accuracy percentage?

Here is the ACDelco page for this Torque adapter: http://www.acdelco-tools.com/index.php?route=product/product&product_id=132It says "Accuracy CW ± 2%; CCW ± 3%".

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⚡ Torque Like a Pro, Buzz Like a Boss!

MULTI UNIT MASTERY - Switch effortlessly between ft-lb, N-m, in-lb, and kg-cm for global versatility.
COMPACT READY TO GO - Lightweight 10g design with included batteries and hard shell case for on-the-go precision.
AUDIBLE VISUAL ALERTS - Never second guess torque with buzzer and LED flash confirming your perfect setting.
ISO 6789 CERTIFIED ACCURACY - Backed by a certificate of calibration to meet professional standards and ensure reliability.
PRECISION AT YOUR FINGERTIPS - Convert any ratchet into a digital torque wrench for flawless tightening every time.

The ACDelco ARM602-4 is a 1/2-inch heavy-duty digital torque adapter delivering precise torque from 14.8 to 147.6 ft-lbs. Featuring an LCD display, audible buzzer, and LED flash alerts, it supports multiple measurement units and meets ISO 6789 standards with a calibration certificate. Lightweight and portable, it transforms any ratchet wrench into a professional-grade digital torque tool.

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Manufacturer	Durofix Inc.
Part number	ARM602-4
Item Weight	10 g
Product Dimensions	4.45 x 4.45 x 7.62 cm; 10 g
Batteries	2 CR2 batteries required. (included)
Item model number	ARM602-4
Size	1/2"
Color	Red
Style	Digital,Ergonomic
Finish	Polished
Material	Plastic
Pattern	1/2" (14.8 to 147.6 ft-lbs.)
Power source type	Air Powered
Torque	147 Foot Pounds
Item Package Quantity	1
Head Style	Square Drive
Number of Handles	1
Measurement System	Metric
Display Style	LCD
Included components	Digital Torque Adapter, Hard Shell Case
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Lithium Manganese Dioxide

ACDelco ARM602-4 1/2” (14.8 to 147.6 ft-lbs.) Heavy Duty Digital Torque Adapter with Buzzer and LED Flash Notification – ISO 6789 Standards with Certificate of Calibration

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