Using this Kuuga Ultimate LED Head is easy. First, if you haven't already, get a CR - 927 battery as it's not included with the product. Then, attach the head to your SH Figuarts Kuuga Ultimate figure (sold separately). Enjoy how the LEDs light up and the compound eyes, with the reduced red color or the included black one, look just like in the show. When it comes to maintenance, keep it away from water and excessive heat. If you want to change the battery, just follow the standard procedure for battery replacement. And remember, shipping is free within the USA, so you can get this cool accessory without extra shipping costs.