NIUNIU Wave induction - with a side wave induction sensor and one touch buckle,simple to work outdoor when wearing this headlamp. Wide Angle view - Wide beams LED provide a 230 degree view with no dead angle in front. Long Distance - In addition to wide angel view provided by the wide beam LED, the Separate side LED can light up to a long distance of 100m/3937in. Safety lighting - Light up the user , front ground and the surrounding of the user to ensure the safety and avoid accident.Durable and stretchable headband with silicone lamp shell is adjustable to any head size,Wearing on the head has no weight-bearingfeeling, the whole is mini and light, simple to carry, waterproof and sweatproof, and easy to clean. No battery provided Power mode:USB quantity of delivery:1 piece (Package contents: Only the above package contents, excluding other products.) size:10 x 5.5 x 3.5cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color:black colors (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)