Logitech K580 Slim Multi-Device Wireless Keyboard – Grey (920-009210)

Wireless Distance: 33 ft (10 m),
Wireless Technology: Logitech Unifying Receiver or Bluetooth low energy,
Unifying Ready Receiver: Yes,
Dimensions: Keyboard: Height: 5.6 in (143.9 mm), Width: 14.7 in (373.5 mm), Depth: 0.84 in (21.3 mm), Weight (including batteries): 19.7 oz (558 g)
Battery Life: 18 months,
Battery Type: 2 x AAA (included),