Describing innovations and inventions

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Across
  1. 3. easy to remove
  2. 4. near and easy to reach/useful
  3. 8. the process of controlling equipment from a distance
  4. 11. successful, and working in the way that was intended (opposite: ineffective)
  5. 12. doing something is new, different, and better than those that existed before
Down
  1. 1. able to make it long
  2. 2. an important new discovery,especially one made after trying for a long time
  3. 5. cheap enough for most people to afford
  4. 6. likely to succeed or be effective in a situation (opposite: impractical)
  5. 7. useful to you because it saves you time (opposite: inconvenient)
  6. 9. work well without wasting time, money, or energy (opposite: inefficient)
  7. 10. looks exactly like a real person or thing