Feature: 1. Provide Safety: This treadmill safety switch is an automatic protection device for the treadmill. When the safety switch exceeds the sensing area of the treadmill, the runner immediately stops working and emits a warning tone to protect the user from falling and getting injured during exercise. 2. ABS Material: This treadmill safety key is made of ABS and is sturdy and not easily damaged, making it suitable for long term use by runners. 3. Strong Clip: Safety clip can be easily clipped onto almost all types of clothing and is very strong, making it simple and convenient to use. 4. Scope of Application: The treadmill safety key works perfectly on most treadmills that require a treadmill key. 5. Compact and Portable: Running machine safety switch safety lock is compact, lightweight, and easy to install. Specification: Item Type: Treadmill Safety Key Material: ABS Weight: Approx. 50g / 1.8oz Package List: 2 x Treadmill Safety Key