The keyboard board is the "bridge" and "translator" connecting the physical buttons on the front panel and the main control system of the equipment. It can accurately and reliably detect which key (or key combination) the operator has pressed and convert this information into a digital signal that can be recognized and processed by the main control board.

• High Reliability: In critical situations like emergency response, keystrokes must be responsive and accurate, with no stuck keys, malfunctions, or false triggers.
• Safety: The keyboard circuit must be effectively electrically isolated from the device's main control unit and signal acquisition components to prevent leakage current from passing through the keyboard and endangering the patient's life.
• Interference Immunity: The electrocardiograph itself is an extremely high-precision analog measurement device and is extremely sensitive to noise. The digital noise generated by keyboard scanning must be effectively suppressed.

Warranty period: 90 days. We provide warranty for both new and used equipment. Different equipment has different warranty periods. Please contact us for specific warranty details.

Express delivery methods include DHL, FedEx, UPS, etc. Delivery typically takes 3-5 working days after payment completion. Shipping costs vary by destination country/region. Contact us for specific shipping details or tracking information.

All equipment, whether new or used, undergoes comprehensive inspection by our engineers before shipment. Our 90-day warranty ensures you can purchase with confidence.

• Use only the correct electrical outlet to avoid damage or malfunction
• Avoid long-term storage in high temperature and high humidity environments
• Do not use high-temperature, high-pressure vapour or ionizing radiation for disinfection
• Do not use chloric disinfectants such as chloride or sodium hypochlorite
• Keep away from water and fire sources

We also provide other medical equipment and accessories. For any questions about this product or other needs, please contact us for prompt assistance.