Description The Grandstream GMC08 is a battery charging pack for the WP820 Cordless WiFi IP Phone.GMC08 is Grandstream’s battery charging pack for its mobile telephony products, including the WP800 series and DP730. 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 over-voltage, over-charge, over-current, and short-circuit management as well as leak protection. Features • Multiple batteries charging stations for Grandstream WP820 batteries • Can charge up to 8 Li-ion batteries • 8 independent dual-color LEDs for charging/discharging status • Three capacity levels: Low-capacity (20%-30%) for sea/land/air transport, intermediate-capacity (60%) for extended duration transportation and storage, and high-capacity (100%) charging • Safety features - Auto temperature control with a cooling fan for high temperatures; device shut off under extreme temperatures • Includes GMC08 charger, power adapter, quick installation guide; batteries not included