Ending today, Lenovo offers its Lenovo N3902A Wireless Mouse in Black, model no. 57Y6574, for $34.99. Coupon code "USPC11MY36574" cuts it to $14. With free shipping, that's $21 off and tied with last month's mention as the lowest total price we could find. Sales tax is added where applicable. This mouse features a 1,000 dpi resolution, USB transmitter, and more. Two AAA batteries are required, but not included.