Material: ABS and PC Size: 5.1*2.75*1.65cm / 1.99"*1.07"*0.64" Color: One color Mode: 3 light modes: high brightness - low brightness - double flash Battery life: 8-12 hours 1. Mini and compact design, easy to carry and does not take up space, it is an ideal choice for cycling enthusiasts. 2. Three light modes can be switched at will to meet the needs of different scenes and greatly improve the safety of night riding. 3. Various wearing methods, can be easily fixed on the handlebars, helmets or backpacks to adapt to various usage habits. 4. Cycling safety warning light, high brightness design ensures that you are found in time in the dark and protects your travel safety. 5. Easy installation, no complicated tools are required, and the setting can be completed in a few seconds, making your every ride more convenient and efficient. Package includes:1pc Bicycle warning light