1. There're two different buy options in this product link, pls check clearly when you place the order.
2.You may need to buy the battries by yourself. SL-87: 2 x 5V AAA Battries SL-89: 4 x AG13 or LR44
This group of SL-78 and SL-97 LED upgrade kits brought by Shockwave Lab (3rd party transformer studio focusing on upgrade kits) for Titans Return Fortress Maxmus, include set as below:
