10 ways to use it

Sophie stuck a badge to Milo's collar on adoption day: a front photo, a profile shot with his markings, his tattoo number. The note reads: "Milo is neutered, vaccinated, and eats gluten-free (yes, really). He meows loudly but he's harmless." Five days without news. A neighbour scans the badge, leaves a message. Sophie replies and picks up Milo that evening.

"Spotted last night behind the bakery on Lilas Street — he looked well-fed."

Arnaud rents his house in the Corrèze on rental platforms. A badge is stuck to the entrance board. Guests scan on arrival: an annotated fuse box photo, the water shut-off valve circled in red, a parking plan, the WiFi code. Between rentals, Arnaud can leave messages about last-minute surprises.

"The downstairs toilet cistern makes noise — flush twice. Repair scheduled for mid-June."

Clubs, families, sports groups — everyone leaves with the same questions: where's the electricity? How to connect the sound system? The badge is screwed to the technical room entrance. Three photos: labelled fuse board, sound system wiring, kitchen extractor switch. Pierre, the municipal agent, leaves notes after each visit.

"The outdoor lighting breaker trips if you plug more than 3 strings of lights into the same socket — split them across the two corridor sockets."

Bought second-hand, with its own mysteries. The badge is tucked under the sun visor on the driver's side. Annotated photos of the dashboard, solar panel, and campsite electrical hookup. When the son goes solo for the first time, he scans and finds everything. When the mechanic comes, he leaves a service note.

"Timing belt replaced — next service at 180,000 km."

Her black suitcase looks like every other black suitcase. The badge is sewn into the handle. A front photo with the stickers, a description in three languages noting the important medication inside. In Amsterdam, an airport agent spots the stray case, scans it, finds Léa's number, calls. She gets her medication on time.

"There is important medication inside. Please contact me."

Three municipal agents tend the same green spaces in rotation, rarely crossing paths. The badge is planted at the foot of the tree. Photos of the trunk condition, the area to monitor, the treatment product used. Each agent leaves a note after their visit. Result: no one prunes too soon, treatments no longer overlap.

"Second treatment done. Wait 6 weeks before pruning."

The badge is stuck to the orange case at the entrance. A 4-step usage photo, a photo of the interior with the electrodes. The device provides voice guidance, but the photo is reassuring. Each month, the maintenance agent scans and leaves a check note. If someone arrives and the case is empty, they can see the last visit instantly.

"Check on 15 April — battery OK, pads valid until 2027."

Day rental. The badge is stuck under the seat, protected by a film. Photos: life jacket and how to adjust it, return point on the lake map. Emergency number. At the end of the day, each renter can report an issue. The owner sees the messages before the next rental — without waiting for the paddle to actually break.

"Right paddle slightly bent."

Thomas and Élodie tend three hives in rotation, rarely on the same day. The badge is on the frame. Photos: colony condition in March, annotated brood frame, lid with last visit date. Élodie applies a treatment and leaves a message. Thomas, due ten days later, sees the message and reschedules. The colony winters in good health.

"Varroa treatment applied on 19 April. Do not open before 3 May."

Nobody knows who waters her. She almost died three times. The badge is in the pot. A photo of the pot with the ideal water level drawn on, a photo of the plant when healthy for reference. Notes: "2 glasses of water per week, no more. Liquid fertiliser one Sunday per month." Now everyone leaves a message when they pass. Marguerite is thriving.

"Watered Monday the 21st." — "Watered Wednesday the 23rd, she was thirsty."