Slim Bluetooth mouse Mini size, best for notebook users or kids Wireless freedom bluetooth 2.0 standard 2.402GHZ-2.480GHZ unlicensed ISM band <10 meter operation range RF output power: Class 2 (under 4 dbm) Spread spectrum: FHSS modulation method: GFSK 1000CPI precision 3 key wireless optical mouse [ Electrical Specification ] Interface: USB1.1 / USB2.0 Sensor report rate on mouse: 3500 frames/sec Operation angle: 360 degrees Operation distance: <10meter Sensor light on mouse: Red Receiver power requirement: 5V DC for USB port Frequency: 2.4GHZ (GFSK) ID number: 16bits IDS Resolutions: 1000CPI Sensor tracking speed: 21inches/sec Air-protocol rate: 250Kbps Low battery indicator: 1.8V Part 4.0: Reliability Button switch activation: 3, 000, 000 cycle Scroll wheel encoder activation: 100, 000 cycle Operating temperature: -5 -C40 degrees celsius Operating humidity: 20% - 90%RH [ Reliability ] Button switch activation: 3, 000, 000 cycle