Size: 16mm exclude the carabiner

Material: brass Batteries: 3 x AG3 button cell batteries LED light: red/white/blue blinking Color: red/blue/white

Flashing light at night and keep your pet safe function:

*Screw tightly to make it blink;

*Attaches the flasher to your pets' collar, and they will blink at night;

*Increase the safety of your pet at night