Product basic info Primary colours: Black Additional colours: Black Height unit: 3 cm Width unit: 3 cm Weight unit: 40 g Material: ABS Additional material: Nylon Physical properties Number of LEDs: 3 Adjustable headband: Yes Inclination adjustable: No On off by waving: No Electrical data LED life span: 100000 h Technical data Weatherproof: Yes Dimmable: No Light mode: 1 led, 3 leds, Blinking, Off Colour of LEDs: White Power supply Batteries included: Yes Number of batteries: 1 Battery voltage rating: 3 V Rechargeable: No Battery composition: Lithium Battery IEC size: CR2032 (5004LC) (EN)