... life and make a colorful life for you. Materialplastic/pc with steel axle, Zinc-alloy and a grade ABS .led ,light ... .Logo ProcessScreen Printing, custom your logoFeature:1.durable plastic with steel axle2.no any battery, powered by rotating the wrist3. ... forwarder Usage: mainly for sports like tennis, golf, basket-ball, table tennis, badminton, bowling, rowing, rock-climbing ,basketball, motocross, ...