Scope of Application and Priority of Validity
1.1 These terms apply to the product sales and services provided by the company within China (excluding Hong Kong, Macao, and Taiwan regions) and authorized overseas regions. Users who purchase products overseas need to comply with the additional terms of local distributors (such as tariff policies, regional warranty restrictions) at the same time, and the company shall not assume additional responsibilities.
1.2 Priority of validity: Product - specific warranty card > Limited - time promotion policies (such as "7 - day unconditional return and exchange") > Special rules announced on the company's official website > These terms. For matters not specified in the above - mentioned documents, these terms shall prevail.

Product and Service Description
2.1 Product parameters (such as charging power, battery life, noise reduction depth) shall be subject to the real - time markings on the official website and the product manual. The company reserves the right to reasonably adjust the parameters due to technological upgrades. Before the adjustment, it will be notified through an official website announcement, which does not constitute a breach of contract.
2.2 Description of supporting services:
• Free technical consultation: Provide product use and fault - troubleshooting guidance through the customer service hotline and online customer service on the official website. The service time is from 9:00 - 21:00 every day.
• Firmware update: For products that support OTA upgrades (such as smart noise - canceling headphones), the company will push optimization patches. Users can choose whether to update on their own. Functional problems caused by non - update are not covered by the warranty.
• Cross - border services: Only support warranty in the original purchase area of the product. When using the product across borders, users need to confirm the local voltage and interface compatibility by themselves. Damage caused by compatibility issues will not be covered by the warranty.

User Rights and Usage Specifications
3.1 User rights:
• Subject to Article 5 of these terms, users have the right to product warranty, replacement, or return due to product quality problems.
• Have the right to query and correct personal information (such as order address, contact information). The specific path is as described in the company's "Privacy Policy".
• If users have objections to the service quality, they can file a complaint through the customer service channel. The company will feedback the handling results within 5 working days.
3.2 Usage specifications:
• Do not disassemble or modify the core components of the product (such as the charger motherboard, headphone noise - canceling module) without permission, or use non - company - authorized third - party accessories (such as non - certified charging cables). Otherwise, the warranty right will be deemed to be waived.
• Normal aging of bio - based material products (such as headphone ear cushions, charger shells) (such as slight fading after 12 months of use) is considered reasonable wear and tear. Replacement will not be provided if it does not affect the function.
• It is prohibited to use the product for commercial profit - making activities (such as leasing, reselling) or for illegal purposes (such as transmitting prohibited information through headphones). Otherwise, the company has the right to terminate the service and pursue legal liability.

Order and Delivery
4.1 Order establishment: After the user submits an order and completes payment, the order is deemed to be established. The company has the right to cancel the order due to insufficient inventory, information errors (such as incorrect price markings), and will refund the full amount paid within 24 hours without additional compensation.
4.2 Delivery and acceptance:
• Domestic orders are delivered by default through SF Express or JD Logistics, and are expected to be delivered within 3 - 7 working days. Users need to check the product appearance, model, and integrity of accessories upon receipt. If no objections are raised within 72 hours after receipt, the product is deemed to be delivered in good condition.
• Overseas orders are delivered by authorized distributors. The freight and tariffs are borne by the user. The delivery time limit is subject to the commitment of the distributor. The company does not assume liability for logistics delays.

Return, Exchange, and Warranty Policy
5.1 Return and exchange rules
5.1.1 7 - day unconditional return and exchange:
• Applicable conditions: Within 7 days from the date of receipt, the product has not been unpacked and used, the accessories are complete (such as the charger's packaging film has not been torn, the headphone protective cover has not been discarded), and it does not affect secondary sales.
• Exceptional cases: Customized products (such as chargers with printed logos), activated smart products (such as headphones bound to user accounts), and products with damaged packaging caused by users do not support unconditional return and exchange.
• Freight bearing: The round - trip freight for unconditional return and exchange is borne by the user. The round - trip freight for return and exchange caused by product quality problems (such as unable to charge upon receipt) is borne by the company.
5.1.2 Return and exchange due to quality problems:
• Within 15 days after receipt, if the product has non - human - caused malfunctions (such as charging interruption, noise - canceling function failure), after being detected and confirmed by the company, the user can choose "return and refund" or "replace with a new product". The detection period does not exceed 3 working days.
5.2 Warranty policy
5.2.1 Warranty period:
• Bio - based headphones, multi - functional wireless charging power banks, safe chargers: 12 months from the date of purchase.
• Accessories (such as original charging cables, storage bags): 3 months from the date of purchase.
5.2.2 Warranty scope (only non - human - caused quality problems):
• Chargers: Wireless charging function failure, PD fast - charging protocol cannot be recognized, shell cracking (not caused by dropping).
• Headphones: Noise reduction depth decreased by more than 50%, frequent Bluetooth disconnection (excluding device compatibility issues), ear cushion falling off (not caused by tearing).
• Power banks: Battery life is less than 60% of the nominal value, USB interface poor contact.
5.2.3 Non - warranty situations:
• Human - caused damage: Malfunctions caused by dropping, squeezing, liquid immersion, high - temperature exposure.
• Consumable wear and tear: Headphone ear cushion wear, power bank shell scratches, charging cable interface oxidation.
• Without valid vouchers: Unable to provide purchase invoices, order screenshots, or product serial numbers.
• Force majeure: Damage caused by natural disasters such as earthquakes, floods, and fires.
5.2.4 Warranty process:

User submits an application: Upload the product serial number, fault photos/videos, and purchase vouchers through the "After - sales Entry" on the official website.

Company review: Feedback the detection plan within 3 working days. If the product needs to be returned for inspection, provide the designated after - sales address.

Handling results:
• Repairable: The repair period does not exceed 7 working days. The freight for returning the repaired product is borne by the company.
• Unrepairable: Replace with a new product of the same model (if there is no same - model product, replace it with an alternative product of the same price). The warranty period after replacement is calculated according to the remaining period of the original product.
• Beyond warranty: Provide a paid repair quotation. Repair will be carried out after the user confirms. The quotation is valid for 3 working days.

Intellectual Property and Confidentiality
6.1 The company has complete intellectual property rights to the product's appearance design, firmware program, and trademark. Users shall not copy, tamper with, or use them for commercial purposes without permission. Otherwise, they need to compensate the company for legal fees, litigation costs, and goodwill losses incurred thereby.
6.2 Users shall assume the obligation of confidentiality for the company's non - public information obtained during the service process. The confidentiality period is 3 years after the information is disclosed. If the company suffers losses due to disclosure, the user needs to bear all compensation responsibilities.

Privacy Protection
7.1 The company will only collect necessary information (such as order information for delivery, device serial number for warranty) in accordance with the "Privacy Policy of Shenzhen Kangxin Biotechnology Co., Ltd." and will not share user personal information with third parties without authorization, except as required by laws and regulations.
7.2 Non - personalized data generated during the product use process (such as charging frequency, noise - canceling mode usage duration) can be used by the company for product optimization without obtaining additional user authorization.

Modification and Termination of Terms
8.1 The company can modify these terms according to changes in laws and regulations (such as the revision of the "Consumer Rights Protection Law") or business adjustments. The modified terms will take effect through an official website announcement. After the announcement is made for 7 days, it is deemed that the user has been informed. If the user does not agree with the modification, they can apply for a refund of the unused service fees (such as extended warranty services), but the products already purchased still apply the terms before modification.
8.2 The company has the right to terminate the service in any of the following situations:
• The user provides false information (such as forging warranty vouchers) to defraud services.
• The company is claimed compensation by a third party due to the user's illegal use of the product.
• The product has reached the scrapping standard (such as a swollen battery with potential safety hazards), and the user refuses to cooperate with the recycling.

Dispute Resolution and Applicable Law
9.1 Disputes arising from these terms shall be resolved through negotiation first. If the negotiation fails, either party has the right to file a lawsuit with the people's court in the company's location (Futian District, Shenzhen).
9.2 The conclusion, validity, interpretation, and performance of these terms shall be governed by the laws of the People's Republic of China (excluding the laws of Hong Kong, Macao, and Taiwan regions). If a certain clause of these terms is determined to be invalid, it does not affect the validity of other clauses.

Others
10.1 The company's failure to exercise a certain right in these terms does not mean that the right is waived. Delayed exercise of rights does not constitute a loss of rights.
10.2 "Force majeure" in these terms refers to objective situations that cannot be foreseen, avoided, and overcome, including but not limited to earthquakes, typhoons, wars, policy adjustments, supply chain disruptions, etc. The company shall not be liable for breach of contract due to service delays or inability to perform caused by force majeure, but shall notify the user in a timely manner.
10.3 These terms come into effect on November 12, 2025, replacing all previously published service terms. If you have any questions about the terms, you can consult through the "Service Terms" section on the official website or contact the customer service.