Logitech Signature K650 Wireless Keyboard with Wrist Rest, Full-Size, BLE Bluetooth or Logi Bolt USB Receiver, Comfort Deep-Cushioned Keys, Numpad,...Brand Logitech Manufacturer Logitech India Customer Care Toll free Number 1800 572 4730 (9: 00am to 6: 00pm Mon Fri), Logitech India Customer Care Toll free Number 1800 572 4730 (9: 00am to 6: 00pm Mon Fri) Model K650 Black Model Name K650 Black Product Dimensions 45. 7 x 19. 3 x 2. 4 cm; 708 g Item model number K650 Black Operating System Chrome OS, Mac OS X 10. 12 Sierra, Windows 10 Hardware Platform Laptop, PC Hardware Interface Bluetooth