RECHARGEABLE LED PET GLOW COLLAR night safety adjustable flash light-up FOR dog YOU CAN CUT THE TUBE DOWN TO THE EXACT SIZE YOU NEED FOR YOUR ANIMAL.  3 MODES (ON,/OFF, FLASHING FAST, BLINKING SLOW) PLEASE MEASURE THE DIAMETER OF YOUR PETS NECK AND MATCH WITH THE NECK  USES: Keeps your pet safe at night! Rugged and durable! Breakaway design as not to injury your pet. Keeps your pet visible. Easy tube connect design. Increased peace of mind. Small is 13.77 inches long max cord length stretched out Med is 19.68 inches long max cord length stretched out Large is 27.56 inches long max cord length stretched out INCLUDES: ONE adjustable RECHARGEABLE LED COLLAR. ONE CHARGER MICRO USB CABLE. (a/c adapter not included)