Freefall Data Systems is currently offering a trade-in program for its discontinued altimeters in exchange for a discount on its products. The trade-in value of your altimeter is issued as a discount code in that amount, valid for one year from issue.

Trade-In Value

SonoAlti $40
ColorAlti $60
SonoAlti 2 $80
ColorAlti 2 $80
SonoAlti 2V $80
DigiAlti $100
SonoAlti 3V $120
SonoAlti 4V $140
SonoAlti 3 $140
ColorAlti 3 $140

A discount can be applied to any type of FDS altimeter.

How It Works

Simply send in your altimeter in any condition to:

Freefall Data Systems LLC
26778 Hickory Loop
Lutz, FL 33559

Be sure to include your name and e-mail address in the shipment so that we can send you a discount code by e-mail. The customer pays the cost of shipping to FDS; we recommend using a tracked shipping service.

Terms and Conditions

All terms and conditions discussed in our Privacy Policy, Shipping and Returns Policy, and Terms of Service apply to this program. Freefall Data Systems cannot be held responsible for items that get lost in the mail. No exchanges for cash will be made. All exchanges are final. Retailers may not participate in the program. Freefall Data Systems LLC reserves the right to change or modify this trade-in program without notice, at any time, and at its sole and absolute discretion.

(Updated June 11, 2026)