Free postage in the US.

Ordering questions? e-mails us at dan.tennishead@gmail.com

Click here to download a return authorization form.

Click here to read our warranty.

Click here  to download calibration instructions. series 12 and older

Click here  to download calibration instructions. series 14 

Click here  to download USER MANUAL series 14 

https://cdn.shopify.com/s/files/1/0457/3053/files/Series14.pdf?3873754399970320083