Get Support


Contact info

Company information

Company name:
Linear Regression Technology Ltd.
Registed address:
1201 Orange Street, Suite 600, Wilmingto, DE, 19801

Support & contacts

Business time:
9:00 AM - 5PM (GMT-8:00) Mon - Fri


After your item is shipped out. A shipment email notice will be sent to your order email. The tracking number and the tracking link would be sent in the notification. Or you could visit to track your order.

Please DOUBLE CHECK your Email inbox or Spam folder.

Total Delivery Time

Delivery Time = Progress time + Shipping time

Progress time: 1-3days
Shipping time:
Stand Shipping (Freeshipping) Time: 4-10 days
Express Shipping Time(some area available) 2-5 days
So, the total time for delivery is 5-13days for Stand Shipping or Stand Shipping for Express Shipping

We will ship to most of countries in the world. If you can't find your country in list below, Please contact us to make a confirm before order placed.
North America: United States, Canada
Europe: German, UK, France, Italy, Spain, Finland, Ireland, Belgium,Portugal, Austria Norway, Switzerland, Denmark, Sweden, Netherlands, Greece
Oceania: Australia, New Zealand
Asia: Russia, Japan, Korea, Singapore, Malaysia, Thailand, Indonesia
Middle East: Turkey, Saudi Arabia, Israel

We need 1-3 progressing days to ship your order. It depends on the recently order we received. So the longest time for order shipped out is 3 days after your order placed.

At frist , Please kindly contact us to submit a refund / return request with your order number or order email.
And then,
For unshipped order, we could cancel the order and refund immediately.
For shipped order, Please return the item to us with a paper written on your order number. Once we received the return item, we will make a refund in 24 hours.