Our brilliantly durable rechargeable NiteHowl LED Safety Necklace is made with flexible polymer that&';s illuminated by bright LEDs and can be recharged for hours of nighttime fun and safety. With Disc-O Select, this NiteHowl makes identifying multiple dogs easy with the ability to choose from one of three selectable colors (red, green, blue), plus a unique Disc-O mode that you&';ll have to see to believe. By illuminating the polymer with multiple colors at the same time, Disc-O mode creates a flowing color-blending pattern that&';s as fun as it is functional. To use the NiteHowl, simply trim the flexible polymer to a custom fit, give the button on the durable, weather resistant housing a quick press, and the entire collar lights up a full 360 degrees, making your dog clearly visible from all angles. PRODUCT DETAILS Rechargeable Disc-O Select technology features three selectable colors of red, green, and blue, or color-changing Disc-O mode Disc-O mode features unique color-blending pattern Easily slides over your dog&';s neck as a bright addition to their existing collar 360Adeg of illumination Weather-resistant Cut-to-size customization for a perfect fit NiteHowl: Cut to fit from 12" - 27" (30.5cm - 68.5cm) NiteHowl Mini: Cut to fit from 9.5" to 14.8" (24cm - 38cm Recharges using micro USB cable (not included) NiteHowl recharge time: 1.5 hours NiteHowl Mini recharge time: 1 hour Run time: NiteHowl: 5.5 hours NiteHowl Mini: 4 hours Weight: NiteHowl: 0.91oz | 54g NiteHowl Mini: 0.71oz | 20g