Tech specs.

Pluronto is a prototype and not yet for sale. These are the specifications of the current design. Anything marked Target hasn't been measured yet, and details may still change before production.

Size and weight

Pluronto (90 × 58 mm) beside a standard payment card (85.6 × 54 mm).
Dimensions
90 × 58 × 7.1 mm, without the keys
Keys
The record key stands 0.8 mm proud, the slider 0.6 mm
Weight
To be measured on prototypes

Design and materials

Case
Aluminium
Finish
Silver
Keys
Aluminium, in the same silver
Back
All aluminium, with no antenna window
Markings
The name, laser-marked
Designed in
Munich, Germany

Controls

Record key
Hold for about 0.3 s to start. Press once to stop. Two quick presses open a three-minute pairing window.
Mode slider
ROOM or CALL, fixed when a recording starts
Mounted
Keys up, USB-C down

Audio

ROOM
Two microphones
CALL
One microphone and one contact sensor In testing
Format
LC3, 32 kbit/s per channel
Data
About 29 MB per hour
Audio quality
To be measured on prototypes

Storage

Capacity
64 GB industrial microSD, built in. Not user-replaceable.
Recording capacity
More than 2,000 hours1
When the card is full
Recording stops. Recordings already on your phone are cleared, oldest first, whenever free space falls below 5 %.
Power loss
Audio is saved to the card every 10 seconds, so a flat battery costs at most the last 10 seconds.

Battery and power

Battery
Lithium-polymer, 800 mAh nominal. The final cell isn't confirmed yet.
Recording time
72 hours per charge Target
Charging
USB-C. Charge time to be measured.
Battery service
Replacement is a service operation, not a user one.

Wireless and sync

Bluetooth
Bluetooth LE with LE Secure Connections and bonding. Up to 4 paired devices.
Wi-Fi
2.4 GHz direct link that Pluronto creates for each transfer, secured with WPA2 and a new random name and password every session
Transfer speed
About 75–85 s per hour of audio over Wi-Fi1. A full 8-hour day in about 10–11 minutes1.
When it syncs
For two minutes after each recording, then brief checks every minute for 10 minutes and every 5 minutes until everything is synced
While recording
Radio off
Privacy
The Bluetooth address changes every 15 minutes. Outside the pairing window, the Bluetooth name carries no serial number.
Range
To be measured on prototypes

Assistant (in the app)

Listening
Only while you record: hold the key to start, press it again to stop. No wake word, no listening in the background.
Transcription
On your iPhone, iPad or Mac, with on-device speech recognition. Which languages are available depends on your device and its system version.
Ask
Answers questions about one conversation or all of them on your device, with Apple Intelligence, and links to the moments it draws on. Needs a device with Apple Intelligence; without it, the app shows the matching passages. In development
Notes
Summaries, action items and decisions from a conversation, written on your device. More kinds of notes are planned. In development

Compatibility

Phones
Attaches with magnets inside its aluminium back to iPhone models with built-in magnets (iPhone 12 and later, except models without them such as iPhone SE and iPhone 16e) and to cases with a magnet ring. For other phones, a thin steel ring that sticks on the phone is planned for the box.
Magnetic hold
Target: stays put in everyday use. To be measured on prototypes. Target
App
Pluronto app for iPhone, iPad and Mac In development
System requirements
Planned: iOS 17, iPadOS 17 and macOS 14 or later