Main Specifications – JZIKI ZK‑B881

General Information

• Model: ZK‑B881, manufactured by Shenzhen Zeng Kang Technology Co. Ltd (brand: Jziki)

• Purpose: Automatic blood pressure monitor for home use, measurements taken on the upper arm

• Clinical Validation: The device is not recommended as there is no clinical validation data listed by Medaval

Technical Data

• Measurement Method: Oscillometric

• Power Supply: DC 6 V from 4 AAA batteries (not included); can also be powered via micro-USB

• Auto Power Off: Yes, after 1 minute of inactivity

• Display: Digital LCD or LED screen

Measurement Ranges and Accuracy

• Blood Pressure Range: 0 to 280 mmHg (0–37.3 kPa)

• Heart Rate (Pulse): 40–199 (or 160–195) beats per minute

• Pressure Accuracy: ±3 mmHg (±0.4 kPa)

• Pulse Accuracy: ±5%

• Resolution: 0.1 kPa (≈ 1 mmHg)

Dimensions and Operating Conditions

• Dimensions: approx. 115 × 96 × 59 mm

• Weight: approx. 220 g (excluding batteries)

• Operating Temperature: +5 °C to +40 °C

• Storage Temperature: –10 to –20 °C (up to +55 °C)

• Humidity: Storage: up to 85% RH (or 10–85%), Operation: 15–85% RH