There's haptic feedback when a peer connects or disconnects, and the ghost marker system gives you a visual alert when someone drops off the grid. Battery wise, there's an Ultra Expedition mode that drops BLE updates to once every 60 seconds and keeps drain under 2% per hour. In normal active mode it's more like 5 second intervals, so heavier on battery but way more responsive. You pick the mode based on how long you'll be out.