Three flash mode
First click_flash
Second click_slow flash
Third click_Long light
(You can change the model through the on/off button)
Between different colors: yellow and orange have high brightness

Anti-Lost/Avoid Car Accident
There are two different styles: battery and rechargeable

size:
XS: width 2.0cm, suitable for neck circumference 28-38cm/11 -15 inches, total length 41cm
S: width 2.5cm, suitable for neck circumference 34-41cm/14-16 inches, total length 44cm
M: width 2.5cm, suitable for neck circumference 37-46cm/15-18 inches, total length 50cm
L: width 2.5cm, suitable for neck circumference 41-52cm/16-20 inches, total length 56cm
XL: width 2.5cm, suitable for neck circumference 42-56cm/16-22 inches, total length 60cm
XXL: width 2.5cm, suitable for neck circumference 43-60cm/17-24 inches, total length 65cm(Suitable for larger dogs)