It'll flash without any batterries.

Only a small amount of light can recharge it(whether indoor or outdoor)

When It  flashes,you can see the time shown on the small LCD screen.

Any  LOGO can be printed on the product according to customer's  requirement. 

product: size: 65*25*8.50  (MM)

Package: 500pcs/Carton

  Carton size: 40.5x30x 26.5cm

/N.W14kgs /G.W15kgs