1Automatic Protection: The safety lock is an automatic protection device for the treadmill. When the switch is out of the treadmill sensing area, the running opportunity immediately stops working and emits a beep to prevent from falling during the exercise.2Applications: Magnetic suction safety switch for electric treadmills is suitable for electric treadmills with rounded magnetic switches.3Easy to Use: It is compact, easy to use, and easy to install. When used, the safety lock is placed in the grooved place of panel and the other end is clipped on the clothes, which is convenient to operate.4Durable Materials: Safety keys are extremely important to maintain the efficient operation of any treadmill. The round treadmill safety key is made of premium ABS and magnets, which enhances their strength and safety.5Lightweigt and Portable: This treadmill emergency stop device is lightweight and portable. You can take it with you when you need to go out for exercise.2 x Emergency Stop Switch 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!