The Fish Logger Digital Fish Scale is more than just a digital fish scale; it works with an app on your phone to record data about your catch. The app is free with your purchase of the Fish Logger. The app and scale use a Bluetooth connection to communicate data to each other, and together they're capable of recording the location, weather, wind speed and direction, temperature, barometric pressure, moon phase, time, and date of your catch. The scale measures the weight of your fish up to 50 pounds, and you can measure your fish with the retractable tape measure. You can also input the fish species and lure type you used to catch it into the Fish Logger app. This wealth of information helps you build a database of your catches so you can make informed decisions on when and where to fish. You?ll never worry about coming home empty-handed again. To celebrate your success, the Fish Logger and phone app can work together to take photos of your trophy fish with a camera control button on the scale. The scale requires 2 AA batteries, which are not included. The Fish Logger will help you take the guesswork out of choosing fishing spots so you can relax and enjoy your time fishing.  MORE THAN A SCALE: The Fish Logger records weight up to 50 pounds and is equipped with a stainless steel lip gripper and retractable tape measure. VALUABLE PHONE APP: The scale can communicate with a phone app using a Bluetooth connection to record the data you collect about your catch. LOG DATA: With the app, the scale is capable of recording the location, weather, wind speed and direction, temperature, barometric pressure, moon phase, time, and date of your catch. CREATE A DATABASE: This wealth of information helps you build a database of your catches so you can make informed decisions on when and where to fish. SHARE YOUR SUCCESS: The scale and phone app work together to take photos of your trophy fish with a camera control button on the scale.