GMC08 is Grandstream's battery charging pack for the WP820 Cordless WiFi IP Phone. It features 8 independent slots to fully charge or discharge multiple batteries simultaneously. For added flexibility, the GMC08 comes with three charging capacities for air shipment, storage capacity control and long endurance. It offers reliable performance and efficiency thanks to built-in overvoltage, over-charge, over-current, and short-circuit management as well as leak protection.