The ROCKBROS bicycle light is an advanced technological solution that combines the functionality of lighting, a horn, and an anti-theft alarm, significantly increasing the level of safety during every journey. The Rockbros Q1 rear bicycle light is made of durable aluminum, is waterproof, features 4 modes and 7 RGB colors. It can be mounted under the saddle or on the seat post. This is a smart ROCKBROS bicycle light with sound signaling. Index: RB.LIGHT035