Key Features:
Multiple choices of mode: Key A (headlight， white light) has 3 modes which is high， low and strobe
Key B (side light， white light) also has 3 modes which is high， low and strobe as well as the key A
Key C (side light， red light) has identical modes with key A and B， but is a red light
Grouped by B+C: White light， red + white light， Strobe with red and white light