Description: Product Name: This device is outboard cut off boat motor emergency kill stop switch with safety tether lanyard. Purpose: Wrap this switch with lanyard around your wrist, it will stop the boat engine when you accidently fall out the boat. How to Use: The switch is open circuit, so you can pull on the lanyard to activate the engine's closing, or you can just press the red button to activate. Spring Wire: Designed with a spring wire lanyard, so it will not hurt your wrists when you fall out of the boat. Universal: This is an essential tool when you driving boats on water, most brand outboard engine motor, such as for Honda, for Tohatsu Quad, Pit, Dirt ATV bike, boat, etc. Specification: Material: Metal Plastic Size Chart: 13x11x3cm/5.12x4.33x3inch Package Includes: 1 Piece Emergency Kill Stop Switch 1 Piece Switch Safety Tether Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!