The tiny Logitech Unifying receiver is small enough to stay in your laptop and connect whenever you need it. Plus, you can easily add another compatible mouse, keyboard or number pad without the hassle of multiple USB receivers. Logitech Advanced 2.4 GHz wireless connectivity gives you the reliability of a cord from up to 10 metres (30 feet) away. Auto-frequency switching means you'll enjoy virtually no signal loss even in the busiest wireless environments. And it helps keep your information secure with 128-bit AES keyboard encryption, one of the highest levels of security available. A 24-month battery life means you can go for years without the hassle of changing batteries. And there's no need for On/Off buttons auto standby saves energy for you. The things you do most are right at your fingertips with eight hot keys for instant access to the Internet, e-mail, play/pause, volume and more. Setup couldn't be easier you simply plug the wireless receiver into a USB port on your desktop, laptop or netbook computer and start using your keyboard right away without software. Keyboard. Frequency band. 2.4 GHz. Multimedia keys. Yes. Keyboard keys operating life. 5 million characters. Keyboard form factor. Full-size (100%). Keyboard language. German. Keyboard layout. QWERTZ. Device interface. RF Wireless. Connectivity technology. Wireless. Design. Product colour. Black. Keyboard style. Straight. Features. Wireless range. 10 m. Power. Number of batteries supported. 4. Battery type. AAA. USB Type-C charging port. No. USB Power Delivery (USB PD). No. Service life of battery. 24 month(s). Battery capacity. 1000 mAh. Battery technology. Alkaline. Number of batteries (keyboard). 2. Keyboard battery type. AAA. Power source type. Battery. Mouse. Mouse included. No. System requirements. Windows operating systems supported. Yes. Weight & dimensions. Keyboard weight. 498 g. Keyboard dimensions (WxDxH). 441 x 18 x 149 mm. Packaging data. Package weight. 658 g. Package height. 158.8 mm. Package depth. 454.1 mm. Package width. 31.8 mm. Packaging content. AC adapter included. No. Batteries included. Yes. Receiver weight. 2 g. Receiver dimensions (WxDxH). 14.4 x 6.6 x 18.7 mm. Unifying receiver. Yes. Receiver type. Unifying receiver. Wireless receiver interface. USB Type-A. Logistics data. Master (outer) case gross weight. 3 kg. Master (outer) case height. 174 mm. Master (outer) case length. 464 mm. Master (outer) case width. 137 mm. Harmonized System (HS) code. 84716060.