Size M --- Neck:15.75-19.69 inches --- Recommended about 33.09-55.11 lb dog to use
Size L --- Neck:19.69-23.62 inches --- Recommended about 55.11-88.18 lb dog to use
【HIGH VISIBILITY IN THE DARK】 With high brightness LED, this collar can be easily seen in the night. Reflective strings with neoprene-padded handle improve visibility in the dark.
【SOLAR/USB CHARGING】 With a built-in solar panel and battery, it can be charged by solar energy or through an USB cable. You don't need to take it down to recharge or replace the battery.
【HIGH QUALITY】 This LED Leash is made of high-quality nylon with double sewing. It's not only lightweight and heavy duty as well.
【TWO LIGHT MODES】 Two lighting modes: steady glow and flash. Press a button to switch from different modes.
【LONG LAST TIME】 Up To 16 hours of lighting with 8 hours solar charging or 2 hours USB charging.
