Comfort Wearing on your head. It can be a guide when you take cycle at night. Compact size. Adjustable base is provided for each head lamp, with back and forth inclination. It is also suitable for most indoor like home maintenance and outdoor activities like camping, hiking, map reading, night fishing, night flying, sailing, caving and hunting etc. Features : Comfort Wearing on your head. Adjustable base is provided for each head lamp, with back and forth inclination. 4 Modes: High Beam (Bright Light Mode), Energy Saving (Low Light Mode), Night Vision (Red Light Mode), Emergency Flash (Red Flashing Mode). Durable and low power consumption Elasticity Strap Adjustable Strap Adjustable Inclination Suitable for most indoor like home maintenance and outdoor activities like camping, hiking, map reading, night fishing, night flying, sailing, caving and hunting etc. Powered by 3 x AAA batteries (NOT included) Length of Strap: min 38cm, max 50cm Dimension: 55 x 44 x 44mm (approx.) Weight: 65g Package Contents: 1 x 4-LED Headlamp JM-8511 1 x Elasticity Strap