Features: OOTDTY The safety lock is a automatic for protections device for the treadmill When the switches is out of the treadmill sensings area, the operating opportunity straight stops working and emits a beep to protect the user from falling throughout the activity suction safety switches for electrical treadmills with round switches It is portable, easy to use, and straightforward to put in When used, the security lock is positioned within the grooves of the panel and the opposite end is clipped at the clothes, which is handy to function Specifications: Type: Switches Lock Material: ABS, Magnets Dimension: S: app/0 L: app/1 Color: Red+White, Red+Black (optional) Quantity: 1Pc Package Includes: 1Pc Switches Lock Note: 1 allow 0-1cm error because of handbook dimension Please make sure you do not mind before you bid 2 to the difference between assorted monitors, the image might not reflect the actual colour of the item Thank you!