Amazon offers Prime members the Clever Wireless Presentation Pointer Remote in Black, model no. C760-BK, for $8.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.01.) That's the lowest total price we could find by a buck, although we saw it for a buck less in May. It's compatible with Windows, Mac, and Android and features 2.4GHz wireless technology. Two AAA batteries are required (not included).