1. Universal Compatibility: This safety key is compatible with most treadmills that require a round-shaped treadmill key, including models from ICON, JOHNSON, Decathlon, and other major brands. 2. Secure Clip: The key features a secure clip that easily attaches to any clothing and stays firmly in place, ensuring convenience during use. 3. Durable ABS Construction: Made from sturdy ABS material, this treadmill safety key is designed to resist damage and provide long-term durability for regular runners. 4. Automatic Safety Device: The safety key serves as an automatic protection mechanism. If the key is pulled from the sensing area, the treadmill immediately stops and emits a warning sound. 5. User-Friendly Design: Designed for ease of use, this safety key offers peace of mind during workouts with its reliable and convenient safety features.