USB charging warning light bicycle tail light

Product Name: Bicycle Laser Tail Light
Shell color: red, blue
Power supply: input 100-240VAC 50/60HZ 0.15A output: 4.2VDC-500MA
Battery: 14500 rechargeable lithium battery; capacity 1200mAh; voltage 3.7V
Working time: continuous working time ≥ 6 hours;
Laser wavelength: 650nm (red light)
Output power: ≤5mw