Come and see our amazing products. This smart sport bracelet is made of silicone.It is multifunctional: Time display, Sports pedometer, Calorie consumption, Kilometers, Sleep monitoring, Long sleep, Sleep quality, Silent vibration alarm, Calls to remind, Life waterproof. It supports both Android and IOS system by bluetooth 4.0 technology. We will laser engraving your logo on the metal clasp or silkscreen on the wristband. It's low-key, high-level, elegant for your brand. Great to promote your brand. Pls confirm with us about the packing info, stock color and exact production time before placing your order.