Using the Mad Rock Wingman belay device is straightforward. First, make sure your rope is the right size, between 8 - 11mm. When you're feeding the rope out, the spring in the device will prevent the carabiner from locking. To engage the brake and lock the device, simply put some load on it and the spring will collapse. Remember, always check your equipment before each use. Look for any signs of wear and tear on the device. Keep it clean and dry to extend its lifespan. If you notice any issues, stop using it and get it checked by a professional.