Universal Compatibility: This safety key is compatible with most treadmills that require a round-shaped treadmill key, including models from ICON, JOHNSON, Yijian, JUNXIA, Decathlon, and AD. Secure Clip: The key 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 security key is resistant to damage and built for long-term use. Automatic Safety Device: The safety key serves 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: Designed for ease of use, the treadmill safety key provides added security and peace of mind during exercise sessions. Its convenient design and automatic safety features make it an essential accessory.