# Grandstream GDS37XX NFC Tag G-AD2 MIFARE DESFire 13.56MHz AES-128

**URL:** https://aio.lv/en/product--grandstream-gds37xxfobg-ad2--12490853
**Data updated:** 2026-06-02 20:11 (EEST)
**Category:** CCTV Accessories
**Manufacturer:** Grandstream
**Manufacturer code:** GDS37xx\_FOB\_G-AD2
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 6.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 5.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--grandstream-gds37xxfobg-ad2--12490853

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Grandstream GDS37XX NFC tag (G-AD2) is a high-security contactless credential utilizing MIFARE DESFire technology. Operating at 13.56MHz, it features robust AES-128 encryption to ensure secure access control and authentication for compatible Grandstream door systems. This durable tag is designed for reliable performance in professional security environments, providing a convenient and secure solution for user identification and facility management.

## Long description

The Grandstream GDS37XX NFC Tag G-AD2 is a high-security contactless credential designed for seamless integration with Grandstream GDS3700 series door systems. Utilizing advanced MIFARE DESFire EV3 technology, this tag operates at a frequency of 13.56 MHz and provides robust protection through AES-128 encryption. As a passive device, it draws power directly from the NFC reader, ensuring reliable and maintenance-free operation for secure access control and facility management.
Advantages
This NFC tag offers a significant security upgrade over standard proximity cards by incorporating the AES-128 encryption algorithm, which effectively prevents unauthorized cloning and data interception. Its durable construction, featuring a combination of PVC and ABS materials, ensures longevity even in demanding professional environments. With a high read cycle capacity exceeding 100,000 uses and a wide operating temperature range, it provides consistent performance for daily authentication tasks in both indoor and outdoor settings.
Suitable for
Secure access control for office buildings
Restricted area entry management
Integration with Grandstream GDS3700 series door stations
Employee identification systems
This tag may not be suitable for systems that do not support the MIFARE DESFire EV3 standard or the 13.56 MHz frequency. It is specifically designed for use with compatible Grandstream hardware and will not function with legacy 125 kHz proximity readers or non-NFC enabled access control systems.
Key specifications
Technology: MIFARE DESFire EV3
Frequency: 13.56 MHz
Encryption: AES-128
Memory: 2 KB
Operating distance: Greater than 10 mm
Durability: Over 100,000 read cycles
Operating temperature: -30 °C to 60 °C
Dimensions: 41 mm x 32 mm x 3.8 mm
To use the tag, simply present it within the 10 mm range of the compatible Grandstream GDS3700 series reader. The passive internal circuitry will automatically receive radio energy from the reader to initiate the authentication process. No batteries or external power sources are required for the tag to function.
What to consider before purchase
Verify compatibility with your existing GDS3700 series door station
Ensure the reader supports MIFARE DESFire EV3 technology
Consider the number of users requiring access credentials
For optimal performance, ensure the tag is not placed directly against metal surfaces, as this may interfere with the radio frequency communication between the tag and the reader.

## FAQ

### How much does the Grandstream GDS37XX NFC Tag G-AD2 MIFARE DESFire cost, and is it available for purchase?

The price is 6.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Grandstream products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Grandstream service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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