TourTrek Signal Slope Golf Laser/GPS Range Finder. TourTrek Signal Slope Laser Rangefinder. Measurement Range: Up to 1,000 yds.Accuracy Range: +/- 1 yd. Power Source: CR2 3V Lithium Ion Battery. We take great pride in our customer service and products. Thank you again for your business and we look forward to working with you again! This item is in the category "Sporting Goods\Golf\Other Golf". The seller is "willpga" and is located in this country: US. This item can be shipped worldwide.