This is a combination bike light.It has a number of different functions:1. Multifunction taillight2. Vibration sensing alarm.3. Brake light4. Turn signals.The taillight has many different states such as blinking, breathing, fast blinking and a couple others. It has an internal battery that is charged via the USB C port.The alarm is armed using the remote that you carry with you. The alarm will go off when it senses too much vibration which may happen if somebody tries to steal your bike. When…