SP-SARCOL-8038-PNK-OS Walk your dog at night without fear with this light-up, green dog collar. USB rechargeable, so you don't have to keep buying the same collar over and over, this collar will be your favorite purchase of the year! Features: Size : 1.0x70cm ( you can cut them to any length ) Leash Length: 16ft Material : Silicone tube + ABS battery box + LED light Battery : Lithium ion battery rechargeable , 3.7v , 70mah Function : Quick flashing , Slow flashing and Steady on