Frequently Asked Questions

Before You Buy

Do you accept business purchase orders (PO)?

Yes. We support PO-based purchases for professional clients and can provide formal quotations and invoices. Net terms may be available upon approval.

Do you offer bulk pricing or reseller discounts?

Yes. Volume pricing starts at 5 units. Contact us for a custom quote tailored to your project or team size.

Are your fiber-optic testing tools compliant with industry standards?

Yes. Our tools follow telecom best practices and are compatible with 1310/1550 nm signals, CW and modulated tones, and standard field environments.

Can I request a recommendation for my use case?

Yes. Our team can advise you on the best tool based on your application—installation, troubleshooting, maintenance, or enterprise deployment.

Do you work with ISPs, contractors, and enterprise IT teams?

Yes. Our clients include fiber contractors, ISPs, integrators, MSPs, and enterprise infrastructure teams across the U.S. and Europe.

Shipping & Handling

How fast do you ship?

Delivery speed depends on location, selected shipping method and Amazon’s logistics routing.

Standard Shipping : 3-6 days
Express Shipping : 2-3 days

Where do orders ship from?

All U.S. orders ship from our Amazon's U.S.-based warehouses for fast delivery.

Do you ship internationally?

Yes. International shipping is available at checkout.

Will I receive tracking information?

Yes. Tracking details are automatically emailed once your order ships.

Do you offer expedited shipping?

Yes. Express options may be available depending on your location.

Support

What if the product doesn’t meet my needs?

You can return the product to us within 30 days according to our refund policy.

Can I speak with a real person before ordering?

Yes. Our English-speaking support team is available from monday to friday 8AM - 6PM (GST) for technical and pre-sales questions. Please visit our contact page.

Do you provide documentation and user guides?

Yes. Every product includes clear, easy-to-follow documentation, and digital copies are available upon request.

Do you offer post-purchase technical assistance?

Yes. We provide troubleshooting support, best-practice guidance, and help with field usage questions.

Product-Specific Questions

Do your tools come calibrated?

Yes. All tools are calibrated before shipping and ready for immediate field use.

Are the batteries rechargeable?

Yes. Our fiber identifiers, VFLs, and power tools use rechargeable batteries.

Are your tools suitable for outdoor / heavy field use?

Yes. Karvinger products are designed for daily field conditions and professional environments.