Product box size 56*32*56cm Individual weight 37g 240 pieces in card packaging 600 pieces of OPP Product Name: USB Rechargeable Tail Light Power lithium battery Color red light, white light, blue light Super Bright LED Light Bulb Mode: Constant Light, Slow Cycle, Strobe, Fast Cycle Applicable pipe diameter suitable for seat posts within 4cm The charging time is 2 hours, and the maximum usage time is 6 hours Features high-brightness LED lights, uses rechargeable lithium polymer batteries, automatic full charge cut-off system Smooth Fashion design, sealed and waterproof.The slender and neat shape matches the prismatic design of the Dao Guang column Ultra-wide-angle illumination provides increased safety protection.Brand new designed elastic straps for a secure fit Installed on various vehicle bodies with different shapes and pipe diameters.