The hard shell bike bag is solid enough, protecting your items from extruding. With USB rechargeable LED taillights can help people behind you clearly identify your location to ensure safer night riding. Waterproof material and rain cover offers dual protection for your valuables from water, dirt and dust. Perfect choice for daily life or short journeys. Features: Come with USB rechargeable LED taillight, provides you with great visibility and safety at night. Can also be charged by your power bank. Hard shell, highly efficient shock absorption, protect items from pinch. High-quality waterproof material with compact zipper, keep your valuables dry and easy to scrub. Rain cover is great water resistance, ultralight, soft, and wear resistant. Easy to install and quick to remove with the help of strong adhesive fastener tape and mount. Wide Application: can be installed on mountain bikes, folding bikes, road bike. Specifications: Material: EVA. Type: Type 1 / Type 2 / Type 3 / Type 4 ( optional ). Color: Black. Bag Size: 19.5 * 8 * 10 cm / 7.7 * 3.1 * 3.9 in Bag Weight: 255 g / 9.0 oz Package List: 1 * Bicycle Bag 1 * USB Cable 1 * Rain Cover 1 * Hex Wrench