• suitable for bottles with a bottle neck inner diameter of 17-20 mm • emits warm white light (3000 K) • extra bright, dimmable with two brightness levels 15/50 Lm • Battery or rechargeable battery operated with 2 standard AA cells (1.5V alkaline or NiMH) • 25-70 hours of lighting time per battery set • 100,000 hour LED lifespan • Switch on/off and dim by simply turning the top lid • suitable for indoor and outdoor use (rainproof) • simple, robust and reliable • Made of high-quality aluminum and acrylic glass • No batteries are included in delivery