“Darling you Idiot!”

"Darling you Idiot" is future gadget #12. It appears in Steins;Gate: My Darling's Embrace.

Origin
The device was thought of by Faris as a way to prevent adultery with couples. Originally, it was suppose to administer and electric shock if it found a partner to be cheating. However, finding the idea of an adultery specific lie-detector as too bleak, Kurisu altered it to work as a device to bring couples closer together.

Function
Future Gadget No. 12's function is to measure the degree of affection between two wearers. The devices' sensors measure body temperature, blood pressure, heartrate, sweat, and psychological changes through sensors on the inside of the matching bracelets. The bracelet's display also seems to monitor mood/feelings. The device has an activation switch, but a deactivation safety was not added by the time it was revealed.

The functions of Future Gadget No. 12 are:
 * Having an affair zaps the offending user.
 * Attempting to remove the bracelet by force zaps both users.
 * Getting too heated in an argument zaps both users.
 * Moving further than one meter away from your partner zaps both users.
 * Holding hands with your partner immediately stops the electrical discharge and prevents any further discharge.
 * If your hearts and minds are deemed to be in sync, the bracelets will deactivate, sliding off easily.

Trivia

 * The final name for this gadget was suggested by Daru as a reference to Lum from Urusei Yatsura who uses this as her catchphrase.
 * Mayuri suggested the name "Love Love Bracelet Chans".
 * Kurisu suggested the name "Affection Measuring Instrument".
 * Okabe suggested the name "ETERNAL ENGAGE".