Aluminum alloy construction, solid, strong, corrosion-resistant and easy ing up. Not only a handlebar extender, but also a rechargeable power bank. Double gaskets protect your handlebar from slipping or scratching the rod. Fix it tightly on your handlebar with 2 screws on both sides. IPX6 waterproof, work normally in rainy days. This is not only a bike extender bracket for your bicycle light, speedometer, etc, but also a rechargeable power bank. Made of high strength Aluminum Alloy, excellent shockproof and maximum firmness. easy to and durable. Give you best support during cycling. Specifications: Material: Aluminium alloy Color: Black Battery: 2 x 18650 Li-battery(not included) Product Size: 205 x 95 mm / 8.1 x 3.7 in Package Size: 25.5 x 11.2 x 4 cm / 10.0 x 4.4 x 1.6 in Package Weight: 250 g / 8.8 oz Package List: 1 x Handlebar Extender Note: Battery is not included. This is not only a bike extender bracket for your bicycle light, speedometer, etc, but also a rechargeable power bank. Made of high strength Aluminum Alloy, excellent shockproof and maximum firmness. easy to and durable. Give you best support during cycling. Specifications: Material: Aluminium alloy Color: Black Battery: 2 x 18650 Li-battery(not included) Product Size: 205 x 95 mm / 8.1 x 3.7 in Package Size: 25.5 x 11.2 x 4 cm / 10.0 x 4.4 x 1.6 in Package Weight: 250 g / 8.8 oz Package List: 1 x Handlebar Extender Note: Battery is not included. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.