1.Effortless Urgent Alert: Knock and shake the cylinder to produce a loud and clear signal, courtesy of the steel balls in this Rattle Stick. It can be attached with the clip, for urgent situations. 2.Convenient Signaling Solution: Equipped with a 360degree rotating quick hook and a quickrelease hook, the Rattle Stick can be easily hung on diving gear. Its sturdy and wearresistant design ensures reliable signaling for enhanced safety during underwater activities. 3.Underwater Companion: Shake the Rattle Stick to easily signal your buddies underwater, whether you want to get their attention, indicate a direction, or object to something. This versatile tool enhances diving safety and makes diving even more enjoyable. 4.LongLasting Performance: Made of lightweight and durable aluminum alloy, this rattle stick is not easy to rust and suitable for long term use. It is a quality material that can withstand underwater pressure and noise.