1.Black wire is direct to earth on the outboard,Emergency kill, stop switch with lanyard for all outboard motors 2.Many of the older outboards do not offer protection if you should fall out of your boat by cutting, stopping the engines ignition 3.This essential device has a lanyard that wraps around your wrist or clips onto your clothing, it will stop the engine in the event of you having an accident on the water 4.The switch is open circuit and closed when the activated by pulling on the lanyard,You may also activate by simply pressing on the red button 5.If you have no spark to your outboards ignition system it may well be that your existing cut of switch may faulty or be stuck in the off position and will need to be replaced Material:ABS colour:Black + red Package Contents: 1 * Emergency Kill Stop Switch 1 * Kill Switch Safety Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!