1Made of high quality nylon, soild and durable. With the luminous LED light, shine at night 2Adjustable length, easy and comfortable to wear 3Easy to operate, switch button for gear adjustment, press once, quickly flash. Press twice, slowly flash. Press three times for constant light. Press four times, light off 4Convenient to charge, with the reusable USB cable, it can be charged by phone charger, laptop, PC, etc. No waste of battery, more environmentally friendly 5Luminous collar prevent from pet lost, ensure dog's safety when walk outside at night
