Workplace equipment Keyboard with large keys

The key layout on the keyboard is strictly vertical.
Provided that the external dimensions of the keyboard are 46x19 cm, the size of the keys exceeds the size of the keys of standard keyboards and has a size of 1.8x 2.1 cm.
Groups of keys (alphabetic, numeric blocks, navigation and control unit) are made in different colors.
All inscriptions on the keyboard are contrasting and readable.
The keyboard has Russian and Latin characters, the size of Russian is larger, Russian characters are pre-fabricated.
The keyboard has a separate row of function keys, the number of keys 83.
The keyboard is waterproof.
Keyboard wireless (transmitter included).
It is compatible with Windows 7/8.