# Wrist Tag ## What Is a Wrist Tag? A **wrist tag** is a wearable device, typically in the form of a band or bracelet, that incorporates technology for identification, tracking, monitoring, or access control. In my personal experience, I first encountered a high-tech wrist tag at a major music festival. It served as my ticket, payment method, and even helped friends locate each other in the crowd. This seamless integration of technology into a simple band profoundly changed my view on wearable convenience and safety. ### My Perspective on Modern Wrist Tags From my point of view, the evolution of the wrist tag from a simple identification tool to a multifunctional wearable represents a significant leap in personal technology. I believe their greatest value lies in applications that enhance safety, healthcare, and operational efficiency, rather than just commercial convenience. ## Technical Specifications and Parameters of a Sample Wrist Tag Product For those interested in the technical details, here are the specifications for a representative **wrist tag** model offered by TIANJUN. This data illustrates the capabilities of current technology. * **Model:** TJ-Band Pro Series 5 * **Primary Chip/Processor:** Nordic Semiconductor nRF52840 (Chip Code: QFAA-R0) * **Connectivity:** Bluetooth 5.2, NFC (ISO 14443A) * **Sensors:** 3-axis accelerometer, optical heart rate monitor, skin temperature sensor. * **Memory:** 1MB Flash, 256KB RAM * **Battery:** Rechargeable lithium-polymer, 120mAh. Typical runtime: 7 days. * **Display:** 1.28-inch AMOLED touchscreen (Resolution: 416 x 416 pixels). * **Physical Dimensions:** * Band Length: 260mm (adjustable). * Tag Module Dimensions: 45mm (L) x 38mm (W) x 12mm (H). * Weight: 32 grams (including band). * **Materials:** Housing: Reinforced polycarbonate. Band: Medical-grade silicone. * **Environmental Rating:** IP68 (water and dust resistant). **Please Note:** The above technical parameters are for reference data based on common industry standards. For precise specifications, compatibility details, or custom solutions, you must **contact the backend administration.** --- ## A Personal Skill Case: Pr