Universal Compatibility: This safety key is compatible with most treadmills that require a round-shaped key, including models from ICON, JOHNSON, Yijian, JUNXIA, Decathlon, and AD. Secure Clip: Features a secure clip that easily attaches to any clothing and stays firmly in place, compatible with all types of attire for convenient use. Durable ABS Construction: Made from sturdy ABS material, this treadmill safety key is resistant to damage and built for long-term use. Automatic Safety Device: Acts as an automatic protection mechanism; when the safety switch moves out of the treadmill's sensing area, the treadmill immediately stops and emits a warning sound. User-Friendly Design: Designed for ease of use, providing added safety and peace of mind during exercise sessions. Its convenient features make it an essential treadmill accessory.