I need a users manual for a Avia Aspire activity tracker. Where can I download it?

No manual available. The generic manual in the link might be close enough.

https://www.google.com/search?q=Avia+2+function+pedometer+manual

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Maker website

Interactive Owner's Manuals

Forest River https://www.forestriverinc.com > Owners > Interactive...
Forest River, Inc., Interactive Owner's Manuals. Ranging from "How-To" videos, pictures and illustrations of various components, systems and features to ...

Owners - Forest River RV

Forest River https://forestriverinc.com > rvs > owners
From one FREE year of Roadside Assistance, to Digital Owners Manuals and FREE ... Visit our dynamic online manual to enhance your ownership experience.

Owner's Manual

Forest River https://www.forestriverinc.com > images > Avia... PDF 2013 Wright Flyer. Revised December 2012 ... This owner's manual is designed as a Quick Reference guide for the operation and care of your new Aviator.
107 pages
They have good owner forums as well.

https://www.google.com/search?q=2012+Forest+River+Windjammer+manual

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https://global-download.acer.com/GDFiles/Document/User%20Manual%20W10/User%20Manual%20W10_Acer_1.0_A_A.zip?acerid=636245521391029128&Step1=DESKTOP&Step2=ASPIRE&Step3=ASPIRE%20TC-780&OS=ALL&LC=en&BC=ACER&SC=EMEA_27

User Manual - Pivotal Living

pivotalliving.tumblr.com/usermanual

To ensure the most accurate tracking of members' sleep and daily activities, we ... Once on, to turn the Pivotal Tracker 1off at any time hold the device button for 5 ...Reset Time and then sync your band to reset the time and band counters.

[PDF]User Manual in English (pdf)

www.polar.com/e_manuals/Loop/Polar.../manual.pdf

Polar ElectroThe big picture: Polar Loop activity tracker, Polar Flow web service, and Polar Flow mobile app. .... tracker you'll first need to change time on your computer.

Manual for Acer Aspire Z3101, can be found here Acer Support & Download Documents

Follow these steps:
1. Open link Acer Support & Download Documents
2. Select product family, select Desktop
3. Select a product line, select Aspire
4. Select a product model, select Aspire Z3101
5. Select operating system, example: Windows 7 Home Basic x32
6. Select tab User Guides
7. Click Download Generic User Guides
8. After download finish, extract file Generic UG_Acer_1.0_A_A.rar
9. Open file, finish

You can find all the information you need on the Acer Aspire 3000 notebook here:
http://www.acer.co.uk/acer/service.do?LanguageISOCtxParam=en&miu10einu24.current.attN2B2F2EEF=3734&sp=page15e&ctx2.c2att1=17&miu10ekcond13.attN2B2F2EEF=3734&CountryISOCtxParam=UK&ctx1g.c2att92=122&ctx1.att21k=1&CRC=2980211862

and you can download the user manual here:
Generic user guide - http://global-download.acer.com/GDFiles/Document/Generic%20UG/Generic%20UG_Acer_1.0_A_A.zip?acerid=634027648145583552&Step1=Notebook&Step2=Aspire&Step3=Aspire%203000&OS=X01&LC=en&BC=Acer&SC=EMEA_27
User manual - http://global-download.acer.com/GDFiles/Document/User%20Manual/as3000_5000_ug_en.zip?acerid=633676942511233625&Step1=Notebook&Step2=Aspire&Step3=Aspire%203000&OS=X01&LC=en&BC=Acer&SC=EMEA_27

Hope that this is of help to you!

I'm not sure how much you could sell it for but If you contact the manufacturer they would most likely send you a copy of the owners manual and if they won't you can usually find a PDF copy of it at the manufacturers website. Hope this helps. =)