Product size:4.1X3.8X4cm
Light Source:4pcs white LED-130LM,20pcs red LED-30LM
Battery: 
front light:1pc  3.7V,  polymer battery (included) 
rear light:1pc  3.7V,  polymer battery (included) 
Operation modes: 8 different modes (front light)

 9 different modes (rear light)

Operating time:2 hrs

Charging time: 1 hr

 Color:trans.clear & trans.red
Product material:PC                                      
Incl. 2PCS USB cable

 Packing: 1pc front light & 1pc back light/color box,10 sets/inner box, 100 sets/carton