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2. List of Logitech products - Wikipedia

   en.wikipedia.org/wiki/List_of_Logitech_products

   New "Hero" sensor is a completely new sensor developed by Logitech. The sensor is optimized for precision and power efficiency. The mouse has no customizable lighting to increase battery life. 88.9 g (3.14 oz) (mouse only) 112.3 g (3.96 oz) (with 1 AA battery) 135.7 g (4.79 oz) (with 2 AA batteries) G PRO Wireless.

3. Keyboard technology - Wikipedia

   en.wikipedia.org/wiki/Keyboard_technology

   The technology of computer keyboards includes many elements. Many different keyboard technologies have been developed for consumer demands and optimized for industrial applications. The standard full-size (100%) computer alphanumeric keyboard typically uses 101 to 105 keys; keyboards integrated in laptop computers are typically less comprehensive.

4. Piano key frequencies - Wikipedia

   en.wikipedia.org/wiki/Piano_key_frequencies

   Piano key frequencies. This is a list of the fundamental frequencies in hertz (cycles per second) of the keys of a modern 88-key standard or 108-key extended piano in twelve-tone equal temperament, with the 49th key, the fifth A (called A 4), tuned to 440 Hz (referred to as A440). [ 1 ][ 2 ] Every octave is made of twelve steps called semitones.

5. Logitech Unifying receiver - Wikipedia

   en.wikipedia.org/wiki/Logitech_Unifying_receiver

   The Logitech Unifying Receiver is a small dedicated USB wireless receiver, based on the nRF24L-family of RF devices, [ 1 ] that allows up to six compatible Logitech human interface devices (such as mice, trackballs, touchpads, and keyboards; headphones are not compatible) to be linked to the same computer using 2.4 GHz band radio communication.

6. List of QWERTY keyboard language variants - Wikipedia

   en.wikipedia.org/wiki/List_of_QWERTY_keyboard...

   Both the Danish and Norwegian keyboards include dedicated keys for the letters Å /å, Æ /æ and Ø /ø, but the placement is a little different, as the Æ and Ø keys are swapped on the Norwegian layout. (The Finnish–Swedish keyboard is also largely similar to the Norwegian layout, but the Ø and Æ are replaced with Ö and Ä.

7. Musical keyboard - Wikipedia

   en.wikipedia.org/wiki/Musical_keyboard

   Layout of a musical keyboard (all octavesshown)The musical keyboard of a Steinwayconcert grand piano. A musical keyboardis the set of adjacent depressible levers or keys on a musical instrument. Keyboards typically contain keys for playing the twelve notes of the Western musical scale, with a combination of larger, longer keys and smaller ...