①. Name: Eva Hard Shell Tail Bag (With Light) ②. Material: Polyester + Eva ③. Capacity: About 1L ④. Weight: About 225Gs ⑤. Size: 18 X 11.5 X 10 Cm ⑥. Color: Black ⑦. Power: Powered by Two AA Batteries (Need to Bring Your Own) ⑧. Product Feature: - Fluorescent Strip - Eye - Catching Night Cycling - Quick Release + Easy Installation - Internal Power Supply - Simple Steps And Quick Installation - Fashionable Carbon Pattern Hard Shell Tail Bag - Textured Carbon Pattern Warning Light Strip - Hanging Tail Light ⑨. Package Contents: 1 X Bicycle Saddle Bag. Only The Above Package Contents, Other Products Are Not Included. ⑩. Note: Light and different screens may cause the color of the item in the picture to be slightly different from the real thing. Please allow +/- 1 - 3cm for measurement.