Power:2pcs AAA batteries(not include)Material:ABS PlasticSize:8.1cm x 5.1cm x 4.1cm/3.16'' x 2'' x 1.6''(approx)

• 100% brand new and high quality.
• Waterproof, Easy to install and easy to release
• Fits most bicycles
• Easy lock design bracket (Included) for seat post
• 4 function modes: Steady lighting / Quick flashing / Slow flashing / Off

100% brand new and high quality.UNIHA