JT-U4‑Compact UHF RFID Reader

Pocket‑Sized | 37g Lightweight | Type‑C Plug‑and‑Play | Multiple Protocol Support | Optional Bluetooth

The JT-U4 (also known as “Xiao Ling Tong”) is a miniature all‑in‑one UHF RFID reader that fits in the palm of your hand. Weighing just 37g and measuring only 9mm thick, this ultra‑compact device is designed for maximum portability and ease of use. Simply connect it to your smartphone, tablet, or PC via Type‑C (with OTG support), and you have a fully functional UHF RFID reader ready to go – no external power supply or complicated setup required.

Powered by a self‑developed UHF RFID chip from Guoxin IOT, the JT-U4 delivers excellent RF performance with an integrated single‑feed ceramic antenna. It supports multiple air interface protocols including ISO18000‑6C/6B, EPC C1G2, optional GB/T 29768‑2013 and GJB 7377.1, as well as proprietary protocols for temperature/humidity sensor tags. With built‑in RSSI and tag data filtering, the JT-U4 provides precise signal measurement and intelligent data management for a wide range of applications.

Whether you’re performing asset audits, inventory checks, or field data collection, the JT-U4 offers a lightweight, affordable, and highly integrated solution that transforms your mobile device into a professional RFID reader.

FEATURES

Ultra‑Compact & Lightweight

  • Dimensions: just 62.5 x 48.0 x 9.0 mm

  • Weighs only 37g – smaller than a credit card

  • Fits in your pocket, bag, or on a keychain

  • Ideal for mobile workers who need RFID on the go

Plug‑and‑Play Simplicity

  • Type‑C interface for both power and communication

  • Supports OTG – connect directly to Android smartphones/tablets

  • No external power adapter required – powered by the host device

  • Simple API library for easy integration and control

Multiple Protocol Support

  • ISO 18000‑6C / 6B, EPC C1G2

  • Optional GB/T 29768‑2013 (China national standard)

  • Optional GJB 7377.1 (Chinese military standard)

  • Supports various temperature/humidity sensor tag protocols

  • Flexible for different application requirements

Reliable RFID Performance

  • Frequency band: 902‑928MHz (FCC)

  • Output power: 0 – 18dBm adjustable

  • Read distance: up to 0.3 meters (configuration dependent)

  • Write distance: up to 0.1 meters

  • Tag read speed: >100 tags per second

  • Multi‑tag processing: 100 tags in 3 seconds

  • RSSI support for signal strength measurement

  • Tag data filtering for targeted data collection

Applications

  • Asset Management – Track office equipment, tools, and IT assets

  • Inventory Verification – Quick cycle counts in warehouses and retail backrooms

  • Field Data Collection – Lightweight option for mobile workers

  • Library & Archive – Book and document identification

  • Access Control – Personnel and vehicle identification

  • Logistics & Supply Chain – Parcel verification and tracking

  • Healthcare – Patient and medication identification

  • Industrial IoT – Sensor tag reading (temperature/humidity)

50
Faster Data Processing
10
PC-Free Operation
30
Sharper Prints
99
Connection Stability

Technical Specifications

Communication Interface

Type‑C, Bluetooth (optional)

Output Power

0 – 18 dBm

Modulation

PR‑ASK, DSB‑ASK

Decoding

FM0, Miller 2/4/8

Baseband Rate

40k, 160k, 320k, 400k

Frequency

902 – 928 MHz

Write Range

Up to 0.1m

Read Range

Up to 0.3m (configuration dependent)

Protocol

ISO 18000‑6C/6B, EPC C1G2; Optional GB/T 29768‑2013, GJB 7377.1; Various temperature/humidity sensor tag protocols

Dimensions

62.5 x 48.0 x 9.0 mm / 2.46 x 1.89 x 0.35 in

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