MFJ Emergency Power-Ready™ Toolbox. Great for charging batteries and taking your rig on-the-go! MFJ’s Power-Ready™ Toolbox is ready for random travel trips, EMCOMM service, or when all else fails! Features dual power-pole 35A contacts, 35A binding posts, low current cigarette lighter socket, dual 5V 2.1A USB ports and a green LED digital voltage monitoring meter. Use group 24-30 size batteries. Includes carrying strap.