The ABB 2TLA020006R2400 JSHD4-4 is a crucial component of the three-position handheld device JSHD4, designed to enhance safety and functionality in industrial settings. This top part features integrated LEDs and a front button, providing clear visual indicators and easy operation. It is compatible with various bottom parts, including AB, AD, AH, AJ, AK, and AL, allowing for versatile configurations to suit different applications. For added security, an anti-tamper option is available with all bottom parts except AK. The JSHD4-4 is essential for enabling controlled machine movement in hazardous areas, such as during troubleshooting, test running, and programming, ensuring operator safety and efficient workflow.