Using the Petzl I’D® EVAC is straightforward. First, connect the device to the anchor. Then, use the safety gate on the moving side - plate to install the 10 - 11.5 mm rope easily. You can control the descent using the ergonomic handle. There are two descent modes to choose from. If you pull too hard on the handle, the anti - panic function will stop the descent automatically. When you want to lock the rope, use the AUTO - LOCK system. After locking, you can take up the rope without touching the handle. When not in use, the handle will automatically switch to the storage position. Make sure to check the product's Instructions for Use and technical tips at www.petzl.com for maximum working load information. Keep in mind that the maximum working load for one person is 150 kg and for two persons (rescue) is 250 kg. For maintenance, regularly check the stainless steel wear plate and other parts for any signs of damage. If there are any issues, refer to the official Petzl guidelines or contact their support team. The product has a 3 - year guarantee, so you can use it with confidence.