Mares XR Back Up Light TorchThe Back Up Light was born as an emergency flashlight in your extended range dives. In the event that the primary torch fails you, with the Back Up Light you can end your dive safely. The Back Up Light was born as an emergency flashlight in your extended range dives. In the event that the primary torch fails you, with the Back Up Light you can end your dive safely. Robust, compact and USB chargeable. The structure offers a grip to fix the carabiner.