It features 3 modes, srong, weak, strobe, so you can switch it as you need. And the respective lighting time is 3 hours, 6 hours and 12 hours. It is water proof.
The output brightness is 300 lumen. It has a signaling light, it is in yellow when the power is less than 20%, red light in charging state and it turns to green when charging completed.

• Size:2.76*1.57*1.18inches
• Material: PC
• Integrated design with good sealing craft ensures excellent waterproof performance, allowing you cycling in any weather conditions.
• The headlight features 3 modes: strong, weak, strobe, switches it as you need.
• Advanced silicone mounting strap. The strap is elastic enough to fit all kinds of bikes and can be mounted on any part of the bike.

Size:2.76*1.57*1.18inchesslaid