your package should contain Windlass bans 2804 user Manual desktop mouse USB receiver batteries (ins your hands right now) features = pays auto sync performance optical sensor, ideal for everyday use = power-saving on-off switch « anon receiver product operating tips clockworks! « The scroll wheel is also a button. Press the scroll wheel {without roiling it} to automatically scroll 3 document or web page, then OVE Your mouse up or down to set the automatic stroll speed. set up mouse 1 insert batteries 2.