---
title: "Model Specification"
slug: "model-specification-6"
updated: 2026-09-15T08:46:09Z
published: 2026-09-15T08:46:09Z
canonical: "knowledge.akuvox.com/model-specification-6"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledge.akuvox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Model Specification

| Model | R28A |
| --- | --- |
| Camera | 2 Megapixels, automatic lighting |
| Light Sensor | ✔ |
| Motion Sensor | ✔ |
| Wiegand Port | ✔ |
| Relay In | x3 |
| Relay Out | x3 |
| RS485 | ✔ |
| Card Reader | 13.56MHz & 125kHz |
| Microphone | x1 |
| Speaker | x1 |
| Power Out | 12V/400mA(Max.) |
| Tamper Alarm | ✔ |
| Power Supply | 802.3af Power-over-Ethernet or 12V power adapter |

## Supported Card Types

The device’s firmware should be 228.30.10.127 or higher:

- Unencrypted ID Card:
  - EM4100
  - EM4200
- Unencrypted IC Card:
  - Mifare Ultralight C/EV1
  - Mifare Classic Compatible Card
  - Mifare Plus-S 2K
  - Mifare Desfire EV1 2K D21
  - Mifare Desfire EV2 D42
  - Mifare Desfire EV2 D22
  - Mifare Desfire Compatible Card (CPU Card, 4-byte): Incompatible with SmartPlus NFC service.
  - NFC Type2 216
  - NFC Type2 215
- SmartPlus APP NFC
- Mifare Classic S50 4-byte Encryption-Compatible Card
- Mifare Desfire EV1 Encrypted Card(AES file encryption mode)
- Mifare Desfire EV2 Encrypted Card(AES file encryption mode)
- Mifare Desfire EV3 Encrypted Card(AES file encryption mode)
- Akuvox Cards:
  - Mifare Classic 1K
  - Mifare S50-1K Card
  - Mifare Desfire EV3 Encrypted Card(AES file encryption mode)