HA-CS01 · Card-Style AI Voice Recorder

Every conversation, captured —
at 4.5 mm thin.

CardMic snaps magnetically to the back of any phone and turns meetings, calls and on-site conversations into transcripts, summaries and action items. Triple-mic pickup, 32GB of local storage and 55+ hours of recording on a single charge.

Wi-Fi 6 BT 5.3 32GB Storage 55h Recording
GMIC AI CardMic HA-CS01 card-style AI voice recorder, front view
4.5 mm
Ultra-thin body
55+ h
Continuous recording
32GB
On-device storage
3 mics
2 omni + 1 bone-conduction
Designed for the working day

Snaps to the phone
your teams already carry.

No extra device to clip, charge or forget. CardMic attaches to MagSafe-compatible phones, slips into a shirt pocket at just 60 g, and starts recording with a single press — so client meetings, site visits and phone calls are captured without breaking the conversation.

Side view of the 4.5 mm CardMic magnetically attaching to the back of a smartphone
CardMic on a desk, syncing over Wi-Fi and Bluetooth
How it works

From pocket to action items in four steps.

Hands holding CardMic beside a smartphone showing the companion app
1

Pair

Connect CardMic to the companion app over Bluetooth.

Finger pressing CardMic attached magnetically to the back of a phone
2

Attach

Snap it to the back of your phone or carry it in a pocket.

Professional speaking toward CardMic held in his hand
3

Press to record

One press starts capture; a short vibration confirms.

Phone in a desk dock beside CardMic, showing AI results
4

Review

Transcripts, summaries and action items appear in the app.

Key Features

Everything a serious deployment needs.

MagSafe-Compatible Mount

Snaps securely to the back of compatible phones, so the recorder is always where the conversation is.

One-Press Recording

A single main button starts and stops capture, with vibration feedback so you never have to look.

Triple-Mic Pickup + AI Noise Reduction

Two omnidirectional mics plus a bone-conduction mic keep voices clear in meeting rooms and on noisy streets.

Status at a Glance

A 0.5" monochrome display shows recording status, battery and device info.

Structured AI Output

Transcription, AI summaries, customizable summary templates, mind maps and speaker identification.

Local-First Storage

32GB of on-device storage keeps recordings secure; Wi-Fi 6 and BT 5.3 sync them when you're ready.

Audio in the real world

Clear voices, wherever the conversation happens.

CardMic on a meeting table picking up voices from around it

In the meeting room

Captures every voice around the table for accurate, speaker-labelled transcripts.

Businessman on a phone call on a busy street with CardMic attached to his phone

On the call

Attached to the phone, CardMic records calls clearly — even on a busy street.

Technical Specifications

The details.

Product NameGMIC AI CardMic — Card-Style AI Voice Recorder
ModelHA-CS01
Wi-FiIEEE 802.11 b/g/n/ax (Wi-Fi 6), 2.4 GHz
Bluetooth5.3
Frequency / Range2.4–2.48 GHz / 10 m
Storage32GB local
Microphones2 × omnidirectional silicon mic + 1 × bone-conduction mic, AI noise reduction
Display0.5" monochrome, 88 × 48
FeedbackVibration motor
MountingMagSafe-compatible magnetic attachment
Battery3.7 V 500 mAh · 55+ hours continuous recording
ChargingUSB Type-C, 5 V / 1 A, approx. 2 hours
MaterialAluminum alloy + glass
Dimensions88.4 × 57 × 4.5 mm
Weight60 g
CompatibilityiOS / Android companion app
CardMic three-view drawing: 57 mm wide, 88.4 mm tall, 4.5 mm thick, with status display, main button, microphones and Type-C port labelled
Three-view dimensions
CardMic outline compared with two smartphone outlines for size and thickness
Size compared with smartphones
Built for

Built for conversation-heavy teams.

Field Service
Sales Teams
Real Estate
Insurance
Consulting
Healthcare
Training & Education
Legal
Property Management
Enterprise Operations
Made by the manufacturer

Engineered and built in-house.

From SMT and assembly to QA, CardMic (HA-CS01) is produced in our own Shenzhen facility — consistent quality from 100 to 100,000+ units.

Functional testing of a voice device on a test fixture in the GMIC factory
Technician inspecting a circuit board under a magnifier lamp
Workers on the device assembly line
A platform, not just a recorder

Built to plug into your stack.

CardMic can be configured for multiple deployment models:

CardMic standing on a desk, connected over Wi-Fi 6 and Bluetooth 5.3

Device → Mobile Application

Capture audio and transmit through a companion application.

Device → Cloud Platform

Upload recordings directly to designated cloud infrastructure.

Device → Enterprise Environment

Connect with proprietary systems, private cloud deployments, and internal business platforms.

Make it yours

Available customization.

Hardware Customization

  • Logo printing
  • Custom housing color & texture
  • Packaging design
  • Accessory customization

Firmware Customization

  • Custom button logic
  • Slide gesture functions
  • Wake-up workflows
  • Device behavior customization

Platform Integration

  • SDK support
  • API integration
  • Cloud endpoint configuration
  • Private server deployment
Enterprise-ready

Put a recorder on every phone in the field.

Request a CardMic sample, schedule a demo, or talk to our engineering team about volume and customization.