Microsoft

Wireless technology
Wireless platform: Nordic nRF51822 (Bluetooth Low Energy)
Wireless frequency: 2.4GHz frequency range
Wireless range: 50 feet (15 meters) in open air, up to 23 feet (7 meters) in typical office environment
Bluetooth profile support: HID Over Gatt Profile (HOGP)
Compatibility and localization
Interface: Bluetooth Low Energy compatible 4.0/4.1
Operating system: Windows 11 Home/Pro / 10/8.1/8*
Windows 10 phone
Android 4.4.2-5.0
Macintosh Mac OS X v10.10.5/10.11.1, and 10.11.4
Top-line system requirements: Requires a PC that meets the requirements for and has installed one of these operating systems: Windows 11 Home/Pro / 10/8.1/8
Mac OS 10.10.5/10.11.1
iOS8.1-9.2.1
Product feature performance
QWERTY key life: 5,000,000 actuations per key
Hot key life: 500,000 actuations per key
Encryption features: AES over Bluetooth LE SSP of Passkey
Hot key features: Windows 10 key (Connect, Notification)
Media key features: Basic (volume up/down, mute, play/pause, back/forward)
Multimedia key life: 500,000 actuations per key
Power requirements
Battery type and quantity: 2 AAA alkaline batteries (included)
Battery life: Up to 12 months
Dimensions
Length: 16.57 in (420.90 mm)
Width: 4.43 in (112.60 mm)
Depth/height: 0.76 in (19.30 mm)
Weight: 14.79 oz (419.30 g) with batteries; battery weight may vary