Improve Safety: The treadmill safety switch is an automatic protection device. When the magnetic key moves out of the detection area, the treadmill will immediately stop and sound an alarm to help prevent accidents during exercise. High-Quality Materials: The treadmill magnetic safety key is made with strong magnets and durable materials, ensuring secure attachment, resistance to damage, and long-term reliability. Strong Magnetic Adsorption: The safety key features strong magnetism to stay securely in place during operation, even with movement or vibration, while still releasing quickly in an emergency for added safety. Easy to Use: Simply attach the magnetic key to the treadmill’s sensor interface and clip the other end to the edge of clothing or pants to establish connection. Universal Compatibility: Designed to fit most treadmill models with a safety key slot, compatible with sensor ports ranging from 18 to 27mm in diameter.