Got a Night Golf event coming up? Each 12" Green LED Yardage Markers with Spikes has 2 functions: flash and steady on. The 12" Green LED Yardage Markers with Spikes comes with 3 AAA batteries which are included, installed, and replaceable. This item is sold by the set. Please order in increments of 1 set which contains 3 lights and 3 spikes. PLEASE NOTE: This product comes with a Ground Stake that has a sharp point. This product when used with the ground stake is NOT a toy, nor should it be used as a toy. Please use this product with adult supervision.