1.Three sizes for you tio choose: M L XL
Size M for.pet bust size:37-48 cm Width: 2.5cm Total length:52cm
Size L for.pet bust size:41-53 cm Width: 2.5cm Total length:57cm
Size XL for.pet bust size:42-65 cm Width: 2.5cm Total length:70cm
2.Battery: 2 * CR2016 button batteries (Included)

• 1.Helps to keep you and your dog & other pets safe during walking in the dark.
• 2.Provide safety for your dogs and pets while it's out alone at night.
• 3.Very convenienct and easy to use: simply pushing the control button makes the light ON/FLASH/OFF.
• 4.4 modes of switch: Quick flash-slow flash-still on- off, according to your actual needs can switch quickly.
• 5.The inside cable strp can be cut into any length you like which will not affect it's brightness.

1.Helps to keep you and your dog & other pets safe during walking in the dark.Gmilk