We love this USB-charged light up leash! It has two modes: blinking or on (no blinking), it has a great handle feel that is easy to keep a grip on and comfortable, and it's really well made. Plus, for each leash purchased, $10 goes to helping us rescue a Blockhead! That's 100% of the profit! The charge lasts a long time (up to a week, depending on duration of your walks). Keep your dog safe and looking adorable while helping us save lives!