The sonic sunglasses were a device the
He wore them during his three week visit to Essex, 1138. He referred to them as “wearable technology”. (The Magician’s Apprentice/ The Witch’s Familiar)
The Twelfth Doctor also attempted to use them to scare a group of Vikings, only for the leader to snap them in half. Clara later recovered half of them and used them the trick the Mireinto believing her to be a threat to avoid, though they declared war regardless. (The Girl Who Died)
However, it would appear the Twelfth Doctor either had a spare pairof sonic sunglasses or he created replacements at some unseen point. (
He used them to unlock
After Osgood’s glasses broke in half,
Used to scan Rigsys mark, and decision to help him following the unusal behaviour, Clara wore them to scan hanging outside the TARDIS (Face The Raven)
When the Twelfth Doctor was trapped in his confession dial (Heaven Sent) over the of four and a half billion years, (Hell Bent) he used the sonic sunglasses to examine a crystalline structure blocking the exit home only to discover it was Azbantium. He then put them on when returning to Gallifrey and proclaimed “the Hybrid is me”. (Heaven Sent)
When confronting Rassilon, military reinforcements arrive and Rassilon believes the General sent for them. However, the Twelfth Doctor puts on the sonic sunglasses which are beeping and states that the General didn’t, he did. He wears them as Rassilon is overthrown, apparently using the sunglasses to broadcast the whole event to the Time Lords.(Hell Bent)
Clara later used them to spy on the Twelfth Doctor and Me talking about the hybrid at the end of time. Afterwards she used them on the neural memory block the Twelfth Doctor stole from the Time Lords to reverse the settings to cause it to erase his own memory. Before losing his memory of her, Clara tucks the sunglasses into the lining of Twelfth Doctor’s jacket. Later, while searching for Clara by reconstructing the gaps in his memory, the Twelfth Doctor used the sonic sunglasses to connect his guitar to a radio, making it act like an amplifier. (Hell Bent)
The sonic sunglasses left the Twelfth Doctor’s possession unbeknownst to him after Me and Clara’s TARDIS diner dematerialised, taking them with it. The TARDIS later gifted The Doctor with a new sonic screwdriver after they are reunited. It is unknown if he has another pairof the glasses. (Hell Bent)
The Twelfth Doctor used them again in an attempt to scan the Testimony. The