Auto Color Rotation LED Light up Glow Pendant Necklace - Glow Necklace Shipped From USA - Delivery 2-5 Business Days Twist the Head of the Light up Pendant Taper to Light it up and the Colors will Change Slowly and Smoothly Automatically through all the Color Spectrum Pendant Length 43mm  1.79 Inch, Pendant Diameter: 10mm  3/8 Inch, Uses Two Batteries LR-626  Included The glow Pendant Taper Necklace Made from 316L Surgical Grade Stainless Steel And Clear Acrylic Taper, Contains 3 Micro RGB LED Lights With Microprocessor Chip that control Auto Color Rotation that gives Beautiful Illuminating and Power Saving Perfect for Festivals and Rave Parties, its Look Great on the Dance Floor and Look Amazing in Dark Atmosphere