200-Pack 125KHz RFID Proximity ID Cards TK4100 EM4100 CR80
200-Pack 125KHz RFID Proximity ID Cards TK4100 EM4100 CR80
200-Pack RFID 125KHz Proximity ID Cards (TK4100 / EM4100)
Get reliable, high-quality access control with this bulk pack of 200 RFID proximity ID cards. Operating at 125KHz and built on the widely compatible TK4100 / EM4100 chip, these cards are the go-to choice for apartments, offices, parking facilities, and more. Each card features a unique, pre-printed ID number for easy identification and management.
⚠️ Important Notice: These cards are read-only and are not writable. They do not support HID devices. Please verify compatibility with your existing 125KHz card reader before purchasing.
Key Features
- ✅ Bulk Value Pack – 200 cards included, ideal for large deployments or replacements
- ✅ Unique ID Per Card – Each card has an individual ID number printed directly on its surface
- ✅ 125KHz Frequency – Compatible with standard 125KHz proximity card readers
- ✅ Read-Only & Waterproof – Durable PVC construction with built-in waterproof protection
- ✅ CR80 Standard Size – Same dimensions as a standard credit card for universal compatibility
- ✅ Wide Application – Suitable for apartment entry systems, office access control, parking gates, and public facility management
- ✅ Fast Read Time – 102ms read speed for smooth, quick access
Technical Specifications
| Chip | TK4100 (Compatible with EM4100) |
| Material | PVC |
| Frequency | 125 KHz |
| Storage | 64-bit |
| Reading Time | 102ms |
| Read Cycles | Up to 100,000 times |
| Card Thickness | 0.8mm ± 0.03mm |
| Reading Distance | 0 – 10cm |
| Card Size | CR80 (Standard Credit Card Size) |
| Country of Origin | Made in Mainland China |
Package Contents
- 200 × 125KHz RFID Proximity ID Cards (TK4100 / EM4100)
Learn More About RFID Technology
For general consumer guidance on electronic products and smart card security, visit the National Institute of Standards and Technology (NIST) – Identity & Access Management.
Frequently Asked Questions
Q: Are these 125KHz RFID proximity cards compatible with all card readers?
A: These TK4100 / EM4100 cards are compatible with any standard 125KHz proximity card reader. However, they do not support HID devices or 13.56MHz readers. Always check your reader's frequency and chip compatibility before purchasing.
Q: Can I write or reprogram data onto these RFID cards?
A: No — these are read-only RFID cards. The unique ID number is permanently encoded at the factory and cannot be changed or overwritten. They are not suitable for use cases requiring writable or rewritable cards.
Q: What is the effective read range of these proximity ID cards?
A: These 125KHz RFID cards have an effective reading distance of 0 to 10cm (approximately 0–4 inches), which is standard for proximity access control systems. Actual read range may vary slightly depending on the reader hardware used.
Q: Are the RFID cards waterproof and durable for everyday use?
A: Yes — the cards are made from durable PVC material with waterproof properties and a CR80 standard size (credit-card size), making them robust enough for everyday badge or access card use in apartments, offices, and commercial facilities.