Model: KB-6113 (SIG: https://www.bluetooth.org/tpg/EPL_Detail.cfm?ProductID=16898 ) - Compact and foldable designed - Made of silicone environmentally protective and ideal for resistance against drink or food spillage at home or office - Features 86-Key - Bluetooth V2.0 - ISM 2.4~2.4835GHz band wireless frequency - Receiving sensitivity: -75dBm - RF output power: up to 4dBm - Massive 10-meter wireless range - Support Windows Server 2003/2000/XP/Vista/MAC OS - Easy carrying with foldable the proper size to fold or roll - Built-in rechargeable 300mAh battery - Recharged by USB powered - Comes with retractable USB cable and software CD - Notes: Bluetooth receiver dongle is NOT included