Product Information Name: Dual-Core Highlight Bicycle Light Material: Aluminium Alloy Size: About 9*4.6*2.6 CM Weight: About 205g ( Headlight Only); About 305g ( Package) Modes: Low / Mid / Highlight / Strobe ( Long Press) Brightness: Max. 2400 Lumens Life Time: Highlight about 4h Waterproof: IP-65 Waterproof Range: About 200-300 m Handlebar Diameter: Fit for max. 3.5cm Features: 2 Led-T6 lamp beads, brightness up to 2400 lumens One-button multi-position design, free switch High brightness, long range, wide illumination range Low Middle Highlight Long Press Flash, four modes Constant current circuit, constant brightness Quick-dismounting clip, compatible with handlebars with a diameter of 3.5 CM or less Can adjust the lamp angle Made of aluminum alloy and high quality plastics Package List: 1* Light 1* USB Cable 1*Taillight 1* Instructions 1* 360 degree rotation bracket 1* Lanyard