I've never been a huge fan of wireless keyboards and mice in the office environment.
Had the boss of a sister company which we used to support decide he and his chief oppo "had" to have a cordless mouse each so, contrary to policy, went out and bought them from PC World* at vast expense. These days it wouldn't happen but things weren't very sophisticated back then and he couldn't understand why his cursor kept moving randomly. Although the two mice were in different offices the desks were actually effectively back-to-back with a thin plasterboard partition between so kept interfering with each other.
*The same person once bought a Sony Vaio laptop from the same source. It was a DSG Retail special brought in directly from Japan and apparently made up of left-over bits. It failed a year later, just out of warranty, with zero support or driver availability.