[USB Charger and Power Bank]The bike handlebar extender with rechargeable feature ,It can be charged by USB port of computer or other power supply. You can use it to charge your phone,don't worry that your phone will power off outdoors . ensure the charging spot remains closed on rainy days. [Sturdy and Durable]The clamps are well designed and sturdy, made of light aluminum alloy which is durable and resistant to corrosion, rusting, or color fading.The screw buckle is durable. Use screws, double protection. Equipped with hexagon wrench, easy to install and detach, use and adjust. [Multifunctional Bicycle Extender]-The practical bike rack adds extra space to your bike, used to fix bike lights, speedometers, GPS devices, smart phone racks, etc. [Compatibility]The bike handlebar extender fit most bikes, suitable for various handlebar sizes ranging from a diameter of 22 mm to 31.8 mm. Colour:black Material:Metal Package Contents: 1 x Bike Handlebar Extender 1 x USB Cable 2 x Battery Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.