Pet Leashes Product Operating Instructions 1. Press and hold the black function key for 1.5 seconds to turn on or off the machine. (With memory function, after long press to shut down, long press again to turn on the mode and light effect are the same as before); 2. Under the power on state, pressing the key twice in succession can switch the mode. 7 kinds of luminous colors, 4 kinds of light changing modes, more than 30 kinds of light changing combinations. Whole Rope GlowsThe core of the rope is made by flexible optical fiber, which can be filled with light. Its eye-catching and cool, both kids and adults will like it, a good choice as gift Powered by AA BatteryUse 4 AA batteries, which can power more than 150 hours glowing (the brightness will decrease with low battery). The AA battery is easy to be replaced when necessary (Battery NOT Include) Length AdjustableThe length of the rope is 9 ft / 2.8 m, rope thickness is 4mm, suitable for all heights and skills. Its easy to adjust, fit for both kids and adults Maximum Comfort Handledurable pvc material skipping rope with extra comfortable handles offers and strong grip, make your workout more easily and enjoyful! Can be applied to any placeWhether it is indoor workout or outdoor sports, day or night exercise, home or gym fitness, using luminous skipping rope is the best choice.