Description This item is a treadmill security key, adoption of good and durable material. This safety key can stop the running machine quickly, and it is a good helper for ensuring your safety while using your treadmill. Easy to use and operate, it is suitable for gym and home use. Features -Color:Red -Material:PP,Aluminum alloy,Nylon -Size:5.80X3.10X3.00cm/2.28X1.22X1.18in -Size(red square):4.00X2.30X1.80cm/1.57X0.90X0.71in -Using reliable material and good craftsmanship, strong and durable for long-serving life. -This safety key is compact size and lightweight, which is very easy for you to install and carry out. -Magnetic safety for electric treadmills with rectangle magnetic . -When the is out of the treadmill sensing area, the treadmill immediately stops working and emits a sound to protect the user from falling during the exercise. -This stop key can effectively control the safe emergency stop of the treadmill in a short time. Using reliable material and good craftsmanship, strong and durable for long-serving life. This safety key is compact size and lightweight, which is very easy for you to install and carry out. Magnetic safety for electric treadmills with rectangle magnetic . When the is out of the treadmill sensing area, the treadmill immediately stops working and emits a sound to protect the user from falling during the exercise. This stop key can effectively control the safe emergency stop of the treadmill in a short time.