Suggested Retail:$56.99. Perixx Periboard-612 Wireless Ergonomic Split Keyboard with Dual Mode 2.4G and Bluetooth Feature, Compatible with Windows 10 and Mac OS X System, Black, US English Layout. ERGONOMIC SPLIT-KEY DESIGN: Integrated palm rest supports your wrists, releases median nerve pressure and reduces forearm tension; Natural arm and hand position while typing minimize chances of RSI, and carpal tunnel syndrome WIRELESS 2. 4 GHZ AND BLUETOOTH CONNECTION: Switch between two connection options at the bottom of the keyboard; nano receiver is stored safely in the compartment at the bottom of the keyboard DUAL OPERATING SYSTEM: Compatible with Mac and Windows including shortcuts and function keys; 4 additional switchable keys for Mac of Windows key layout and a key puller is also provided in the box. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.