USB charging warning light bicycle tail light $ 8.67 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 time6 hours; Laser wavelength: 650nm (red light) Output power: 5mw
