Rechargeable bike light set with USB charging for both front and rear use. The headlight contains a built in 2000 mAh rechargeable lithium battery and the taillight contains a built in 330 mAh rechargeable lithium battery. Key features - Four light modes: one touch switch provides four settings to match conditions and preference: full brightness, half brightness, slow flashing, and fast flashing. - Practical design: lightweight and simple structure for easy carrying. IPX4 waterproof rating protects against rain and splashes. - Battery status indicator: the headlight displays a red indicator when battery power is too low, helping you know when to recharge. - Easy mounting without tools: the headlight includes a mounting bracket that can be fixed to the handlebars. silicone mounting straps for both headlight and taillight feature four openings to securely fit most seat post sizes; both lights loosen and fasten easily without tools. Versatility and applications - Ideal for cycling in low light, night riding, or areas with limited visibility. - Suitable for outdoor activities beyond cycling, including hiking and camping. - Can function as an emergency flashlight when needed. Compatibility and performance - Front light and rear light each have dedicated built in lithium batteries (headlight 2000 mAh, taillight 330 mAh) for reliable power. - Lightweight construction enhances portability and handling during rides. - The mounting system accommodates common handlebar and seat post configurations for quick setup and removal.