While mine wasn’t the casting one I do have the Lucky brand one. It’s ok and basically just let’s you know if there is something in the water. Personal if it was me I should have saved a little longer and bought maybe a small garmin or even a used unit from someone. My buddy found a garmin Stryker 4 I think for around $100 and it’s a better unit. The lucky is convenient being about the size of phone and charged by usb.