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Small rectangular USB RFID reader with matte black finish

Hetai Tech

Hetai Tech JT303 125K 13.56 MHz RFID card reader

SKU CH-AVKJ-7DYAT MPN JT303

A 125 kHz and 13.56 MHz RFID reader that types a 10-digit UID via USB keyboard emulation with no drivers required

  • Product type8-in-1
  • Types 10-digit UID automatically when card detected
  • Reads 125 kHz EM4100 and EM4200 tags at 60 mm
  • Works with Windows, Linux, Android and iOS via USB
  • No driver or software installation required
  • Compact 75 × 20 × 7.5 mm design weighs 80 g

Dual-frequency RFID reader

The Hetai Tech JT303 reads both 125 kHz EM4100-series proximity cards and 13.56 MHz NFC tags, presenting each UID as keystrokes through a virtual USB keyboard interface. It requires no drivers or custom software on Windows, Linux, Android or iOS devices, making it a plug-and-play solution for access-control logging or time-and-attendance capture.

Sustained scanning behaviour

The module delivers a single UID read in roughly .2 seconds at distances up to 60 mm, and its Manchester 64-bit encoding keeps the data stream stable during repeated presentations. Power draw stays within the standard USB 5 V ±5 % envelope, so the reader remains responsive during long sessions without taxing laptop ports or tablet OTG adapters.

USB keyboard interface limits

Output is restricted to a 10-digit decimal string per card, transmitted at 9600 kbit/s over the virtual keyboard channel, so the host sees only plain numbers without protocol framing or encryption. The reader cannot write to tags, cannot parse NDEF records and will not work with phones that supply less than 5 V on their USB port.

How it compares

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

Price $18.99
Typical for this category: the median of 511 items is $18.99.

Specifications

Product
Product type8-in-1

Questions about this item

How much power does the JT303 draw when reading cards all day?

It runs from a standard DC 5 V supply with a ±5 % tolerance, so any USB port that delivers 5 V will keep it operating continuously.

What connector or adapter must I already have to plug this reader into my tablet?

The reader uses a Mini USB plug; tablets with USB-C or Lightning ports need a compatible OTG adapter or converter to connect.

Will the JT303 work alongside my older EM4100 proximity cards?

Yes — it reads EM4100, EM4200, EM4102, TK4100 and compatible 125 kHz tags, outputting a 10-digit decimal UID via USB keyboard emulation.

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