Thank you for viewing. This is the MATRIX smart helmet by LUMOS. It has an LED matrix display on the back, making it a highly visible model. Model number: LHEMX5-AO I used it as a bicycle helmet. Jet white 56-61cm 【Condition】 There are scratches and dirt from use. There are no problems with the operation. Please check the photos for details. Please purchase only if you understand that this is a used item. We will ship via anonymous delivery with shipping included.