DefenseGuard Antimicrobial Protection* maintains a clean surface and continuously protects the keyboard by preventing the growth of micro-organisms. Simultaneous multi-device connectivity for up to 3 devices. - Slim yet robust design - Practical battery life display - On/off switch - Includes 2 x AAA batteries Please note: *The antimicrobial protection is limited to the unit itself. This keyboard has been treated with an antimicrobial additive. Active ingredient: Silver phosphate glass (nano) EPA Est/ 99234-CA-1