what type of batteries does this use and are they expensive?

It uses Lithium Battery 3V CR2032. They're not expensive. http://www.walmart.com/ip/INSTEN-5pcs-CR-2032-CR2032-3V-Lithium-Button-Cell-Coin-Battery/31515503

Two questions: 1. Will the scale stay 'on', giving you more time to add or subtract from the substance being weighed?

Yes. Seems like they all should do that since you are using it to precisely measure ingredients. This one does give you plenty of time to add or subtract.

is this weight calibrated?

This scale comes precalibrated with a readability of 1 gram and a weight capacity of 11 lbs. / 5 kg.

can you calibrate unit to a known weight if it gets off? ie the scale initially weighs an object to be 5g but over time the scale shows it as 7g

To calibrate, press the tare button or turn off and back on. Scales that weigh in small increments can easily be influenced by as little as a breeze, product spilled on the scale, or product left in a cup, etc. Placement of product at various positions can also affect the reading. Weight should not creep if item being weighed is left in a static situation. And lastly, a good set of calibration weights are always necessary to assure true readings.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Smart Weigh USPS Postal, Mail & Letter Scale, 11 lb (5 kg), Glass Platform

Smart Weigh USPS Postal, Mail & Letter Scale, 11 lb (5 kg), Glass Platform

Product ID: 1144851

Details

Brand
Smart Weigh
Color
Black
Display Type
LCD
Recommended Uses For Product
Home Business
Special Feature
Auto Shut Off

🔄Tare function for versatile use

🧊Tempered glass platform

⚖️11 lb max precision

฿3922

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚖️ Ship Smart, Save Time, Stay Ahead!

BUILT TO ENDURE - Tempered glass platform engineered for daily hustle
ROOM FOR EVERY PACKAGE - Wide platform fits larger parcels with ease
PRECISION THAT PAYS OFF - Accurate to 1g/0.1oz for flawless postage every time
SMALL BIZS BEST FRIEND - Trusted by entrepreneurs for home, office, and commercial use
VERSATILITY AT YOUR FINGERTIPS - Tare function lets you weigh containers, liquids, and more

The Smart Weigh USPS Postal Scale combines precision accuracy within 1g/0.1oz and a durable tempered glass platform to handle packages up to 11 lbs. Featuring a versatile tare function and a wide weighing surface, it’s designed for seamless use in home offices and small businesses, ensuring reliable, professional-grade shipping every time.

Specifications

ASIN	B00FJFJDGS
Best Sellers Rank	#114,552 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #394 in Kitchen Scales
Brand	Smart Weigh
Brand Name	Smart Weigh
Color	Black
Customer Reviews	4.7 out of 5 stars 2,921 Reviews
Display Type	LCD
Form Factor	Countertop
Global Trade Identification Number	00700358199363
Included Components	Digital Scale, USB Cable, Manual, Warranty Card
Item Highlight	11 lb Glass Postal Scale
Item Weight	1.4 pounds
Manufacturer	Smart Weigh
Material Type	Alloy Steel, Stainless Steel
Measurement Type	lb/oz/ml/g
Model	PL11B
Number of Packs	1
Part Number	PL11B
Readout Accuracy	2.86 g
Recommended Uses For Product	Home Business, Mailing, Postal, Shipping, Warehouse
Special Feature	Auto Shut Off, Backlit Display , Large Display, Portable, Tare Function
Special Features	Auto Shut Off, Backlit Display, Large Display, Portable, Tare Function
UPC	065283195423 885233565409 885494961781 700358199363 778295206611 061644263671 885261089106
Unit Count	1 Count
Warranty Description	2 Year Manufacturer Warranty
Weigh Scale Type	Counter Scale
Weight Capacity Maximum	11 pounds
Weight Limit	11 pounds

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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