1.Breakthrough Design--Lighted nocks for arrows with switch, turn on automatically when shoot
2.Amazing LED Nock--Very bright, fit for arrows with 6.2mm/.244" inside diameter
3.High Visibility--Clear plastic for maximum light transmission
4.Long Battery Life--48+ hours of battery life,long lasting but light weight, find the quarry and arrow even at night or dawn
5.Super Handy--Simple On/Off switch design (without tool),no assemble required