Sonocaddie uses the global positioning satellite system. (GPS) Simply press a button to record different the beginning coordinates of your shot and the end coordinates of your shot, and Sonocaddie will accurately calculate the shot distance. Please consult the user guide for more details.

GPS Golf device measures the distance of 'C' is shorter the 'B' of laser equipment

No. Sonocaddie provides all the information you need on the golf course (distance to greens, obstacles, hazards, driving distances, etc.) . So, there's no need to change any your tactics, except maybe to concentrate on getting better.

Please check the GPS reception on the GPS Status screen at the time to be sure you have at least 6 stable satellite signals. Also check the Settings menu (Wrench icon) to be sure the distance units (yard or meter) are correct.
In addition, the distance in GPS device is nothing related with the locations of tee boxes-The distance is calculated based on the difference between the apparent position and the known position. The apparent position is the moveable location of the GPS device which receives the signal.
The known position is fixed and is the coordinates, such as bunker and green, downloaded from the database of website. Therefore when you stand by the tee box (apparent position of GPS device you carry), the unit will calculate the distance between you and the green (known position).

Warranty is 90 days from the original date of purchase. Within the warranty period, optional extended warranty may be purchased to extend the manufacturer's warranty. Please refer membership plan for more details. The extended warranty is only available for Sonocaddie unit and does not include accessories and components. And any repair or replacement of the product will be covered by Sonocaddie at no charge for parts or labor.

To obtain a warranty service, purchaser must require a RMA number and return the item postpaid with the proof the original purchase date and return to the address. Please email to sales@sonocaddie.com to require a RMA number and further information.

The above warranty does not cover any damage caused by accident, improper use, misuse or other human errors, and defects from installation and batteries. Our warranty service departments will double check the item if the unit is valid for warranty service.

With invalid warranty service or period, purchaser will be notified all the cost for parts, labor, and shipping cost. Therefore, please contact our warranty service department for further details.

*Shipping & handling, taxes will be shown during checkout before you place your final order.

You are more than welcome to request your home course data to www.sonocaddie.com to see if we need your help by sending us the most up to date course scorecard with course layout information on it. To request new courses, amend course data, and add scorecard or course name on our website, please click mappingV100@sonocaddie.com to request the courses information. There is no subscription fee of requesting course data. Requesting steps as below:
1. Email us the course information you want to play, including course name/address/website/scorecard/layout (if available)
2. Once receiving the information, we will check if the satellite images and course layout of the courses required are available in the database, and will email you the results.

Most of the time, we are able to map the course except when course change layout recently (thus our Satellite photo is not yet up to date) or our Satellite photo data is deem to old thus the data is not accurate enough (we feel the data needs to be within 5yd to be acceptable).
Sometimes we need more information such as course layout from users to complete the mapping procedure. We will let you know if necessary. Of course, it would be great and efficient if you can provide us this information from the beginning. You could also map the course yourself by refering Sonocaddie user guide.