China's SRRC filing (Radio Transmission Equipment Type Approval Certification) is a mandatory certification system implemented by the State Radio Regulation Committee (SRRC) for radio transmission equipment sold or used within China. The following is a comprehensive analysis of its key points:

I. Core Certification Requirements

  1. Legal Basis
    Under the Radio Regulation of the People's Republic of China, all radio transmission equipment (except micro-power short-range devices) must pass SRRC certification, obtain the Radio Transmission Equipment Type Approval Certificate, and be marked with CMIIT ID (e.g., CMIIT ID:2023DPXXXX). Uncertified devices face fines of up to RMB 1 million and are prohibited from being placed on the market.
  2. Scope of Application

    • Mandatory Certification Equipment: 5G/4G communication modules, Wi-Fi routers, Bluetooth devices, walkie-talkies, automotive radar, IoT terminals (e.g., NB-IoT modules), etc.

    • Exempted Equipment: Receive-only devices (e.g., radios), micro-power short-range devices (e.g., 2.4GHz Wi-Fi devices with power ≤10mW).

  3. Technical Standards

    • The spurious emission limit for the 2483.5-2500MHz band has been tightened from -30dBm/1MHz to -40dBm/1MHz.

    • Multi-antenna devices must incorporate beamforming gain to calculate Equivalent Isotropically Radiated Power (EIRP).

    • Bluetooth devices must pass interference avoidance testing (duty cycle ≤10%).

    • Key Test Items: Frequency tolerance, transmit power, spurious emissions, occupied bandwidth, interference avoidance (e.g., Bluetooth devices must cease transmission upon detecting interference).

    • New Regulation Changes (Effective 2025):

II. Certification Process Details

  1. Document Preparation

    • Basic Documents: Application form (Chinese and English), business license, ISO 9001 certificate, technical manual (including circuit diagrams and RF parameters), prototype photos (showing reserved CMIIT ID location).

    • Special Requirements: OEM agreement (if contract manufacturing), module certificate (if embedding a certified wireless module).

  2. Testing and Review

    • Laboratory Selection: SRRC-accredited laboratories such as the State Radio Monitoring Center, China Academy of Information and Communications Technology, etc.

    • Testing Timeline: Standard process approximately 8 weeks; expedited can be reduced to 4 weeks (cost increases 30%-50%).

    • Fee Range: RMB 6,000-30,000 (depending on device complexity), including testing and review fees.

  3. Application and Certification

    • Online Submission: Through the MIIT Government Service Platform (https://ythzxfw.miit.gov.cn), fill in information and upload materials; review period approximately 1-2 weeks.

    • Certificate Validity: 5 years; renewal can be applied 30 days before expiry (no retesting required).

III. Post-Filing Supervision and Compliance

  1. Labeling Requirements
    Devices must be marked with the CMIIT ID by etching or laser engraving, with character height ≥1mm, and must be displayed simultaneously on the manual and packaging.
  2. Sales Filing
    Sales documentation (e.g., contracts, e-commerce platform records) must be submitted within 3 months of certification, otherwise subsequent certification applications may be affected.
  3. Market Spot Checks
    Regulatory authorities conduct random inspections; enterprises must retain at least one sample for reference, ensuring consistency with certified parameters.

IV. Special Equipment Certification Key Points

  1. 5G Devices

    • Must comply with power limits for bands such as n1/n3/n41 (e.g., n41 band EIRP ≤23dBm), and pass RF conformance testing.

    • Test items include IPv6 compatibility, SAR (Specific Absorption Rate), OTA (Over-the-Air performance).

  2. IoT Devices

    • Low-power devices (e.g., 2.4GHz power ≤10mW) may be exempt from certification, but must comply with the Technical Requirements for Micro-Power Short-Range Radio Equipment.

    • High-power devices (e.g., LoRa terminals) require separate application; test items include Equivalent Isotropically Radiated Power (EIRP) and spectrum mask.

  3. Imported Equipment

    • Certification must be completed before customs clearance; provide a Chinese-language manual and localized technical documentation; appoint a China-based agent to submit the application.

V. Frequently Asked Questions

  1. What to Do If Testing Fails?
    Rectify and resubmit for testing; the rectification cycle is typically 1-2 weeks. It is recommended to conduct pre-testing in advance to reduce risk.
  2. Certificate Changes and Renewal

    • Parameter Changes: Hardware or RF parameter adjustments require re-certification.

    • Address Changes: Only a written declaration is required; no retesting needed.

  3. How to Apply for Multiple Device Models?
    Different hardware versions within the same series must apply separately (e.g., ABC-01 and ABC-02), unless they qualify for module exemption.

VI. Compliance Recommendations

  1. Plan Ahead:

    • Complete the upgrade of certificates under the old regulations before December 31, 2025, to avoid invalidation.

    • Prioritize the use of certified wireless modules (e.g., Bluetooth, Wi-Fi) to reduce overall device testing complexity.

  2. Technical Optimization:

    • RF circuit design must comply with the latest limits (e.g., 2.4GHz Wi-Fi power ≤20dBm) to avoid subsequent rectification.

    • Multi-antenna devices must provide a beamforming gain calculation report.

  3. Agency Selection:
    Commission laboratories with 5G and IoT certification experience (e.g., Kaiwei Testing, Guangce Group) to shorten timelines and improve pass rates.


By following the above processes and key points, enterprises can systematically complete SRRC filing and ensure compliant product market entry. It is recommended to closely monitor MIIT policy updates and introduce compliance assessment at the design stage to avoid certification delays due to standard changes.