ADVANCED DESIGN:USB rechargeable front and rear lights, built-in 2000mAh rechargeable lithium battery for headlight and built-in 330mAh rechargeable lithium battery for taillight FOUR LIGHT MODE OPTIONS:The headlight and taillight have a switch at the bottom. One touch with four different lighting modes to suit your preference Includes full brightness, half brightness, fast blink and slow blink EASY INSTALLATION:The lighthouse is equipped with a bracket that can be easily attached to the handlebar The silicone strap for the headlight and taillight is equipped with four openings that fit snugly around most seat posts The headlight and the rear light can be easily detached and attached, and no tools are required MULTIFUNCTION:This bike light set is versatile enough for cycling, hiking, camping or other outdoor activities. outdoors and can be used as an emergency flashlight It’s ideal for cycling at night or in places where visibility and safety are of concern So just start your next