List of Features/Considerations for Keypad

• vertical (volume) slider better than horizontal

• include a wrist rest/support

• concave key surface for non-slip is best

• sufficient distance between the keys (no less than half a key width)

• shape of key matches function?

• larger keys better (but not too large as to be unidentifiable as a key)

• arrange keys to line up with resting finger positions?

• include a keyguard for accurate key selection?

• keys only activated when pressed down for sufficient time, in order to ignore accidental key presses (eg. caps lock key on mac os)

• solution for left-handed users or users who cannot reach the keypad (e.g. wheelchair too large to roll right up to kiosk)?
  • e.g. a detachable, hand-held device like the 3G Off-Table Handtrack wire mouse

• audio feedback upon key selection or “snap” key for user-confirmation

• internal key illumination – could brighten upon engagement

• physical separation of keypad groups:
  • navigation keys (forward, back, select)
  • home
  • help
  • audio keys (volume, headphone jack, audio description on/off)

• audio description/screen reader icon improvement (speech bubble?)

• “back” key function needs to be clearer – change to undo? Need better icon

• embossed/(engraved?) symbols on keys for tactile feedback
  • e.g. volume slider with embossed icon along with +/- embossed symbols indicating volume limits at each end

• put headphone jack in centre of headphone icon?

• sufficient height of keys (>5mm as per ETSI)

• contrast between keys and kiosk base (illumination will help) as well as contrast between key label/icon and key itself

• minimum size of keys (>12mm in any dimension)

• key material (matte surface best for reduced glare but non-slip)

• size of characters on keys >7.5mm with 1mm between character and edge of key

• sans serif font, lowercase letter height > ½ of upper case height

• function keys should be labelled with the full function names in the national or preferred language, or by well-known symbols