Awesome customer service and such a great product. Helped me find my arrow and the start of the blood trail for my 7 pointer, a doe, my wife’s doe and my brothers first doe this year!! My brothers doe the nock was on all night when we came back later the next day to find the arrow it was still shining strong. Awesome battery life and way more simple to use than any other nock out there. With the FIT system you have tons of arrow diameters covered. A must buy!