Ebuyingcity Adjustable Fashion Flashing Nylon LED Light Pet Dog Safety Collar Black Base Color Pink Fluorescent Light - Size L Large Color: Black base color, Pink Fluorescent Light Size: L, 1"W * 18"-21"L Adjustable Walk Your Pet Safely and Be Seen at night 3 modes adjustable: 1.Steady On 2.fast flash 3.normal flash Powered by 2PCS CR2032 batteries(BATTERY IS NOT INCLUDE)