This product is either discontinued or we cannot get that from suppliers.
Kensington 72452 ACCO Pro Fit Mobile, Black, Connectivity Wireless, Scrollwheel Controls, Auto Power Off, Ambidextrous Design, Sensor Laser, Wireless Type 2.4Ghz.
Using a compact nano receiver, provides the ultimate freedom and mobility for your mouse with a completely reliable wireless connection so you can always be productive.