Material: High quality technical plastic + waterproof rubber gasket Headlight Battery used: 4*AAA batteries (battery not included) Color: black, red new and high quality Tail light Battery used: 2* AAA batteries (battery not included) Type: Bicycle light Size: As the picture shows Package includes: 1 x Butterfly tail light (battery not included) 1 x headlight (battery not included ) Features: 1.Easy to use: One-button control switch on the back of the product, in addition to the back there is a card (clip), can be clipped to the bicycle, belt or shoulder or backpack, school bags and other belongings, play a safety warning role to protect personal safety. 2. Different light modes: Press once: 5 lights long light. Press twice: 5 lights jump quickly. Press three times: 5 lights at the same time flash slowly. Press fourth time - seventh time: 5 lights that roll and flash in different directions. You can choose different light modes according to your wishes. 3.Easy to install: Can be installed in seconds without any tools, easy to use, made of extremely light material, you won't even feel the weight of the bike easily.4.Versatile: This bike light gives you a bright light and provides extra safety and protection in bad weather. It is not only a bicycle light, it can also be used as an emergency flashlight, flashlight, helmet headlamp for riding, camping, walking or other night work. tips: 1. Due to the light and monitor effect, colors may have slight difference. 2. Please allow a little size error due to manual measurement. Thank you for your understanding!