Be Seen. Be Safe. Secure micro hook & loop fastener - fits collars up to 1" Available in two colors, both featuring passively reflective paw pattern: Grey & Pink Features bright Red LED - Flash or Glow Modes Battery Life Glow Mode: 75 hours, Flash Mode: 100 Hours Weather Resistant Features 1 x 2032 3V Replaceable Lithium Battery Dimensions: 6.89" x 1.30" x 0.42" | 175.16mm x 33.00mm x 1.86mm Weight: 0.49oz | 14.00g