Microsoft Explorer 2.4GHz Wireless BlueTrack Mini Mouse for $16.99. Here is a screenshot for reference. This is part of Amazon’s lightning deal and the price is valid until 2pm PDT on 5/8 while supplies last. Shipping is free on orders over $25. If needed, use this Filler Tool to pad the order to qualify for free shipping. This mouse features BlueTrack Technology which claims to track better on more surfaces, along with a 30-ft wireless range. Most places have this wireless mouse for about $29 or much more.