The Finalmouse Starlight-12 Phantom Wireless Mouse (Medium) features a magnesium chassis with an Ultem base. The Ultem lets the wireless signal through, but is not as strong as the magnesium top. At approximately 47 grams, the Finalmouse Starlight-12 Phantom Wireless Mouse (Medium) provides more stability and control, with lighter and snappier clicks than its predecessors. The rechargeable Jaunch Lithium Ion battery lasts about 160 continuous hours, or about 3 weeks of average computer use. Built on a Nordic RF platform and using Godspeed Wireless technology, the Finalmouse Starlight-12 Phantom Wireless Mouse (Medium) offers next-gen performance. <br> <br> The Finalmouse Starlight-12 Phantom Wireless Mouse (Medium) was released on November 8, 2021, at a retail price of $189.99.