Sold as 1 Each. Professional 3D Navigation in CAD - Intuitively and precisely navigate digital models or views with the patented Six-Degrees-of-Freedom (6DoF) sensor. Wireless Freedom - 3Dconnexion 2.4GHz Wireless technology ensures a reliable, real-time connection to your 3D content. One Month of Battery Life - Space Mouse Wireless will operate for up to a month between charges. Meets or exceeds NCC, BSMI, RCM, FCC, IC, RoHS, MIC, and WEEE standards.