... /AA batteries,press the button on the bottom to light up. 3. Flash light color: Red, yellow, bule, green, muti-color ... canbe customrized 4. Material: PS 6. Three brilliant light modes which include: Rapid Strobe, Slow Flashing, and Still. 7. Waterproof, safe ... Low- power -consumption, energy -saving, lift-time durable. use in:bars ,parties,weddings,gatherings,disco,KTV,and many other spcial occasions ...