... headlamp 2 in 1, A) Fixed on a bicycle, used as bicycle light; B) With elastic rubber band, used ... Switch: Soft touch the end cap switch buttom to change mode, press it and holding for 2 seconds ... color, When the voltage run low, it will change to red color. 7) Battery: Battery pack with ... . III. Stardard completely 1set included following parts: 1) Bicycle Lamp: 1PCS 2) Battery Pack: 1PCS 3) Battery ...