We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small white card reader with 3.5mm audio jack

Hetai Tech

Hetai Tech ACR32 3.5mm 13.56MHz Smart Card Reader

SKU CH-C8B4-V3S7M

A 3.5mm audio-jack 13.56MHz smart card reader and writer with rechargeable battery, USB 2.0 CCID mode and ISO 7816 Class A, B, C support

  • Product type8-in-1
  • Reads smart & magnetic cards via 3.5mm jack
  • AES-128 & DUKPT secure transactions
  • Rechargeable Li-ion battery powers mobile use
  • USB 2.0 CCID & PC/SC for PC-linked mode
  • Supports ISO7816 Class A, B, C cards

Mobile audio-jack card reader

The Hetai Tech ACR32 connects to smartphones and tablets through a 3.5 mm audio jack and operates at 13.56 MHz for contactless smart-card transactions. It is aimed at mobile professionals who need to read ISO 7816 Class A, B and C cards or magnetic-stripe media while away from a desk. A built-in rechargeable lithium-ion battery powers the unit in standalone mode.

Sustained-load behaviour

When linked to a PC over USB 2.0 Full Speed the reader draws power from the host and recharges its battery, allowing continuous operation without manual charging breaks. CCID compliance and PC/SC support keep the data path stable during long sessions, while AES-128 encryption with DUKPT key management protects each transaction. The dual-interface design prevents downtime when switching between mobile and desktop environments.

Installation notes

Plug the 3.5 mm connector into the audio port and launch a compatible app; no driver installation is required on the mobile side. In USB mode the device enumerates as a standard CCID reader so most operating systems recognise it immediately. The only common issue is a muted or mis-configured microphone input that blocks the audio-jack signalling, which is resolved by adjusting the device’s audio routing settings.

How it compares

Measured against everything we stock in USB & Internal Card Readers, at today’s prices. Recalculated every night.

Price $53.99
Pricier than about 87% of the 511 comparable items (median $18.99).

Specifications

Product
Product type8-in-1

Questions about this item

How much power does the Hetai Tech ACR32 draw when it runs all day on its rechargeable lithium-ion battery?

The reader is powered by a rechargeable lithium-ion battery that charges through the USB 2.0 full-speed link when connected to a PC, so it does not draw power from the mobile device during battery-powered use.

What must I already own — specific port, cable or software — to use the ACR32 with my phone?

You need a device with a 3.5 mm audio jack and an application that supports the reader's ISO 7816 Class A, B and C smart card interface.

Will the ACR32 work alongside my older ISO 7816 Class A smart cards and existing PC/SC software?

Yes, the reader supports ISO 7816 Class A, B and C cards and is CCID compliant with PC/SC and CT-API support, so it works with existing PC/SC-based applications and Class A cards.

More in USB & Internal Card Readers

Similar items