product specifications : width 2.5cm length 45-100cm (suitable for children to fat people). The size can be adjusted according to customer requirements Luminous color: Red blue yellow green pink orange and white tricolor note: the ribbon used for white tricolor is black Ribbon color: Various colors are available (please contact customer service for instructions) Product material: Webbing + LED light strip + controller + Japanese buckle + buckle Packing method: Ordinary OPP bag packaging Luminous mode: Long on - fast flash - slow flash - stop (controlled by switch) Product use: This product can be used in a series of outdoor activities such as running mountaineering skating and cycling. It has the function of safety warning and landmark through super bright flashing. Due to the personality trend of this product it is suitable for fashionable people both during the day and at night. Warm tips: 1. The size of this product is OK. If you have special needs you can contact customer service for instructions.