5 colors can be selected (red by default): red, yellow, blue, pink, green. Please leave a message if you need other colors. VISIBLE IN THE DARK - Beautiful and super bright light up dog collar, buy this dog light up collar and make sure your dog is always visible to cyclists, passers-by, drivers and other traffic participants, greatly increasing the safety of your dog playing at night , preventing them from getting lost and avoiding vehicles. Cut to Fit Any Size - Dog LED Light Collar measures 27.6" (70cm) long. Our dog collars can be easily cut to size for any size dog. You will no longer waste time or money buying the incorrect size. But please leave 3-4cm more when cutting to avoid uncomfortable wearing. 3 Light Settings - The flashing dog collar light has three light modes, you can switch the light mode between fast flashing, slow flashing or steady at the touch of a button. DURABLE AND STURDY - The light pipe of the LED dog collar is durable and waterproof, it will also work well in daily rain. Please note that the rechargeable dog collar is only waterproof and not suitable for swimming or soaking. USB RECHARGEABLE - This LED dog collar features smart USB charging technology and a Li-ion battery with a full charge time of 1 hour. The LED dog collar is waterproof and can withstand all weather conditions!