* Bluetooth wireless connectivity, 10 meters effective distance * The latest wireless Bluetooth technology, in line with V2.0 + EDR CLASS 2 technology. * The biggest current work: 14 MA * Standby time: 15 minutes * Standby current: 0.6 MA * Effective distance: 10 m * Mouse Size: 91 * 55 * 32 mm * Mouse Weight: 52 g * Battery specifications: two AAA alkaline or nickel-metal hydride batteries. * System requirements: WINDOWS95/98/2000/XP/VISTA and Mac OSX system. Bluetooth Specification: Bluetooth Specification V2.0 with EDR USB Protocol: Full Speed USB V1.1 Compliant with USB 2.0 Frequency: 2.4G hz ISM band Modulation Method: GFSK/8DPSK/(pi/4 DQPSK) Output Power: Up to +4dBm RF transmit power with power level control 2dBm RF Sensitivity: ≦-84dBm at 0.1% BER Transfer Rates: Asynchronous:2Mbps (MAX) Security: Authentication and encryption Power Supply: 3.3V ~~4.2V Operating Temperature: -20~+55 Centigrade Dimension: 27mm×13mm×2mm