This 2-pack set of bike lights are water resistant. The have a 10-15 meter range of light. This set is tough, long lasting.  Used for commuting, touring or just riding for fun. Also, can be used on clothing, your belt or bags also for visibility. Use AAA batteries that are not supplied, 4 for the front light and 2 for the rear lights. Used to fit for handlebar no larger than 0.13? in diameter. The lights have multiple functions for different lighting options.
 

Features:

Front light Dimension: 10 x 6.5 x3.3 mm/0.39? x0.26? x0.13?
Rear light Dimension: 9.5 x 3.0 mm/0.37? x 1.12?

Package includes:

2 x Front Bike Light
2 x Rear Bike Light