Description: Our bicycle headlight is enclosure with aluminum alloy, CNC machining, anodizing surface treatment. It can be used headlamp or bicycle light.Fits great on handlebars with easy rubber mounts.Specially designed with USB power port (5V), perfect to be used with power bank (not included) so that you can totally get rid of the cumbersome battery carrying. Hope you enjoy your riding. Features: 1.Enclosure with aluminum alloy, CNC machining, anodizing surface treatment. 2.High LED quality assuring you of a bright, long-lasting ride. 3. It must be connected to an external power supply and it can be used normally. 4.Fits great on handlebars with easy rubber mounts. 5. Suitable for cycling, climbing, fishing, hunting, camping and other outdoor activities. Specifications: Case Material: Aluminium Alloy Color: Red, Black, Silver (optional) Weight: approx. 106g Wire Length: approx. 116.5cm / 45.8" Lamp Cap Length: approx. 5.2cm / 2" Lamp Cap Width: approx. 4cm / 1.5" Rubber Ring Length: approx. 7.5cm / 2.9" , 5.8cm / 2.2" Rubber Ring Width: approx. 2.1cm / 0.8" Brightness: 1200LM LED:T6 3 Switch Mode: Strong Brightness / Normal Brightness / Flashing Power Source: This lamp don't need to install any battery, just use the USB cable to connect the power bank to use Quantity: 1pc Bicycle Headlight, 2pcs Rubber Ring Package Included: 1 x Bicycle Headlight 2 x Rubber Rings Note: 1. This product should work with a power bank. 2.Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 3.Monitors are not calibrated same, item color displayed in photos may be showing slightly 1Enclosure with aluminum alloy, CNC machining, anodizing surface treatment 2High LED quality assuring you of a bright, long-lasting ride 3Must be connected to an external power supply and it can be used normally 4Fits great on handlebars with easy rubber mounts 5Suitable for cycling, climbing, fishing, hunting, camping and other outdoor activities