"Supplied primarily for use with our riding helmets range, this light is also ideal for bike and quad helmets. Longer and over-top straps. Long service life on 3 x AAA batteries (not included). Ten LED bulbs operate sequentially on repeated pressing of on/off button - 2 lamps for economy, 4 and 8 for more power, plus 2 red flashing emergency lights on 4th press. Head swivels up and down for preferred lighting angle. Batteries not included."