The **SES-2B4W-R** is a specific model of an **Electronic Article Surveillance (EAS)** tag, commonly used in retail environments to prevent shoplifting. It belongs to the "Spider Wrap" or "Bottle Wrap" family of security devices. --- ### 1. General Specifications The device is designed to secure high-value merchandise that is difficult to protect with standard hard tags. | Feature | Specification | | :--- | :--- | | **Detection Type** | RF (Radio Frequency) or AM (Acousto-Magnetic) | | **Operating Frequency** | 8.2 MHz (RF) or 58 kHz (AM) | | **Alarm Logic** | 2-Alarm or 3-Alarm systems | | **Material** | ABS Plastic high-impact housing | | **Cable Type** | Coated aircraft-grade steel lanyard | --- ### 2. Internal Electronic Components The "brains" of the SES-2B4W-R consist of several key electronic subsystems that allow it to interact with store pedestals and detect tampering. #### A. The Resonator/Antenna * **RF Coil:** A copper wire inductor paired with a capacitor that resonates at **8.2 MHz**. * **AM Strip:** If it is the AM version, it contains a magnetostrictive material that vibrates at **58 kHz**. * **Function:** This component picks up the signal sent by the security gates at the store exit. #### B. The Integrated Circuit (IC) & Logic Board The "2B" in the model name often refers to the **2-Alarm** logic: 1. **EAS Alarm:** Triggers the store's exit pedestals. 2. **Self-Alarm:** A built-in piezo speaker inside the tag triggers if the cable is cut. * **Microcontroller:** A low-power chip monitors the continuity of the steel cables. #### C. Power Source * **Battery:** Usually powered by a **CR2032 or CR2450** lithium coin cell battery. * **Power Management:** The circuit remains in a "sleep" mode until the cable loop is closed or a signal is detected, ensuring a battery life of 2–3 years. #### D. Audible Alert System * **Piezoelectric Transducer:** A small, high-pitched buzzer that emits a 90dB+ siren if the security cable is compromised (cut) or if the device passes through the detection field. --- ### 3. Mechanical-Electronic Interface The device uses a **locking mechanism** that acts as an electrical switch. * **Conductive Path:** The steel cables are not just for physical strength; they carry a low-voltage electrical signal. * **Tamper Sensor:** If the cable is cut, the circuit is broken, immediately triggering the internal piezo alarm. * **Magnetic Release:** The internal locking pin is released using a high-strength neodymium magnetic detacher (S3 or Superlock compatible). --- ### 4. Summary of Operation 1. **Arming:** When the cables are tightened and the locking pin is engaged, the circuit completes. 2. **Monitoring:** The internal IC checks for electrical continuity. 3. **Breach:** If the cable is cut, the IC detects an "Open Circuit" and triggers the onboard siren. 4. **Exit:** If the tag enters an RF/AM field at the door, the resonator induces a current that the gate detects, causing the gate to alarm.