Harukokoro(TM)Rechargeable LED Luminous Waterproof USB Dog Collars, 7 Colors, Retractable Strap, 3 Flash Modes Ultra bright optical fiber, Color: Red, Blue, Yellow, Green, Orange, Pink; Material: Polyester ribbon, Fish screen translucent surface, Super bright light flat fiber; Flash mode: long light. Flash. Slow flash; Battery: CR2032 2PCS Button Battery; Battery life: 60-80 hours, the normal use of 2-3 months; the battery can be replaced.