The Keystone has a standard USB connector at one end, to plug into your laptop, wall or auto adapter, or public charging station. The micro USB connector at the other end plugs into your ASP flashlight, compatible mobile phone, or the whole universe of other portable electronics that use the micro USB standard. Unique, reversible plug design allows connectors to fit into charge ports in any orientation unlike common connectors, there's no "right side up," so there's less fumbling and less chance of damaging fragile connecting wires.
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