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Electronic Bracelet

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· Shelf Time: 2019-03-11
· Product Name: 721 Vital sign detection wristband
· Product Model:


   1. Principle of vital sign detection wristband

The vital sign (VS) detection wristband emits green light periodically, and the receiving end periodically receives the light reflected by the body tissue. The reflected light can induce the blood vessel volume change as the blood flows, which measure the heart rate.

2. RFID operation mode of VS detection wristband

The wristband works in an ‘active or passive’ mode, that is, it transmits a signal actively, or triggered by an instruction form a reader (or a gravity sensor, or low-frequency activator). The RF frequency is adjustable.

The passive working mode is that the activator distributed in the zone or inside and outside the access control has been actively transmitting a low-frequency 125 KHz signal at a close distance. Any wristband that is within the range of the activator can be successfully activated. It can obtain the activator number and calculate RSSI field strength. Then it transmits the data such as ‘tag ID + tag status + activator number + RSSI value + heart rate monitoring value’wirelessly at 2.4 GHz to the adjacent 2.4 GHz reader which will upload to the host computer with various standard interfaces like RJ45 and RS485 after receiving the wireless data.

3. Access identification of VS Detection wristband

     A low-frequency 125 KHz activator can be placed respectively inside and outside the access control. The effective activation range could be adjusted by changing the antenna position, adjusting the transmit power, and choosing different antenna shapes and dimensions. The wristband will be activated by the activators inside and outside in turn when it passes through the access control. According to the activating sequence, the entry and exit judgment could be accurately made.

4. High-precision Real-time locating of VS Detection wristband

With signal Angle of Arrival (AoA) locating technology, the high-precision locating system has a locating base station which can accurately measure the direction of the wristband signal and the coordinates of X and y.

5. Anti-dismantle function of VS detection wristband

    Up to two anti-dismantle alarm functions can be provided. Unauthorized removal will be alarmed immediately by sending a wireless signal. Specific equipment is required to reset it physically and wirelessly.

6. Communication security of VS detection wristband

When the active electronic wristband communicates with the supporting reader, a special communication protocol is used to verify the legitimacy of the device. In order to prevent data cracking, a sophisticated encryption algorithm is developed to ensure data security in the communication process.

7. Reliability of VS detection wristband

The product fully considers the application requirements of industrial environment such as lightning protection, waterproofing and shock protection. The production process of the reader strictly conforms to the ISO 9001 quality standard. Multi-level quality inspection is implemented to ensure good performance and quality of the products.

721 Vital sign detection wristband

1. Accurate vital sign detection

2. Real-time positioning, high precision (20cm precise positioning)

3. Low power consumption and long standby time

4. Good anti-collision performance (200 sheets / sec anti-collision performance)

5. 50 meters depth waterproof grade, anti-soak and impact-resistant

6. Support fast charging

7. OLED display

8. Refined appearance, concise design, smooth lines


1. Monitoring vital signs of detainees in public security house and bureau of drug abuse control

2. Monitoring vital signs of suspects in public security case-handling centers, disciplinary committees, procuratorates and courts

 3. Monitoring vital signs of special persons such as elder citizens, the weak and the sick in prison

 4. Specialized personnel monitoring management system for mental hospitals, infectious disease hospitals, etc.

Product Parameter

721 vital sign detection wristband

Heart rate monitoring: intermittent timed heart rate monitoring

Time display: OLED digital display (optional)

Screen size: 0.66 "(optional)

Connection: RFID acquisition equipment and mobile phone bluetooth connection

Recognition distance: 0 ~ 100m

Recognition speed: 120 km/h

Identification ability: 200 cards/second anti-collision performance

Identification method: omnidirectional identification

Operating frequency: 2.4 GHz & active 125KHz&13.56M

Communication rates: 250Kb/s, 1Mb/s, 2Mb/s

Communication mechanism: synchronous communication mechanism based on TDMA and CDMA

Anti-interference: channel isolation technology, multiple devices do not interfere with each other

Security: cryptographic computation and security authentication to prevent link detection

Gravity sensing: supported

Power consumption standard: the average working power is milliwatt

Battery configuration: lithium manganese rechargeable battery, capacity 420mAh

Service life: 3~5 months per charge

Packaging characteristics: PA engineering plastics, high strength drop and vibration resistance

Environmental features: working temperature - 20 ℃ ~ 70 ℃ Working humidity < 95%

Reliability: anti - soak and anti - shock, meets the requirements of industrial environment

Shape: wristband or leg irons, can provide OEM custom service

Inch: 43.36 * 37.66 * 15mm (length * width * thickness)

Weight: 57 g

Installation: screw lock


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