Smart Rings Waterproof

2-in-i design can be used as watch and wrist light, also with a compass for outdoor use.Light switch on two sides, two seconds to open, close and adjust the light.The watch has good waterproof ability and is suitable for sports fans.Built-in lithium battery for long standby, 3 hours for strong brightness and 8 hours for low brightness.Built-in LED power display device. When the voltage is low, the indicator turns red to remind you.The adjustable strap is made of silicone and is allergy-free.