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