This is a replacement 230 V AC mains converter for the Maglite Mag Charger rechargeable flashlight system (the "V2" version, per the supplier). It plugs into a standard wall socket and powers the Mag Charger charging cradle, so the flashlight can be kept charged in its cradle at home or in the office. Use it to replace a lost or damaged charger, or to set up a second charging point for an existing Mag Charger. Check that your cradle is a Mag Charger model before ordering; the ML150LR and Mag-Tac use their own converters. We could not find Maglite's own listing for this exact part, so the details above are based on the supplier description.