Feature: 1. STRONG CLIP: The clip on the treadmill magnetic safety switch can be easily and securely clipped to any part of your clothing. It clips easily to almost all types of clothing and is both simple and easy to use. 2. WIDELY APPLICABLE: The treadmill magnetic safety lock works perfectly on most treadmills that require a round treadmill key, is compact and lightweight, and is easy to install. 3. EMERGENCY STOP: When the safety switch is beyond the sensing area of the treadmill, the treadmill will stop working immediately and emit a beep sound to guard the user from falling and getting hurt during the exercise process. 4. PROFESSIONAL ACCESSORY: This treadmill safety key is an automatic guard device for treadmills. It is extremely important to keep the treadmill running efficiently, if the treadmill fails to start, it is usually due to a faulty safety lock. 5. PREMIUM MATERIAL: This treadmill safety switch is made of premium ABS plastic, sturdy and unbreakable, providing high strength and safety, suitable for runners to use for a long time. Specification: Item Type: Treadmill Safety Switch Material: ABS, Magnet Size: Approx. 45 x 25mm / 1.77 x 0.98in . Package List: 2 x Treadmill Safety Switch Note: Manual measurement, please allow some errors.