The TC-500B is Radarsign's most portable radar speed sign and the easiest to move. The locking pole mount bracket set was specifically designed to secure the battery powered radar speed sign easily and safely to multiple pole or post locations. There are two pieces in the bracket set, the front bracket that attaches permanently to the sign and the back bracket that attaches permanently to each pole or post location. The TC-500B includes an AC adapter/charger and two 12 volt 18 amp/hour AGM batteries. The sign will operate for up to three weeks on battery back-up, and recharges in 12 hours.