Cryptic crossword No 3,369

Hi emaherself, just wondering if you forgot to tick the Show Annotations box in Actions?

Thanks emaherself for another clever and engaging puzzle! Not so many anagrams this time and some really well worked clues- my guess is you’ve been doing some research on different devices and indicators. I picked out the following faves: 11a, 12a, 14a (clever, though questionable surface), 1d, 7d, 13d and 15d. Further thoughts below…