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Shenzhen Bao'an Youledai Electronics Factory has been engaged in intelligent wearable manufacturing for many years, with rich research and development, production experience, and the ability to undertake OEM and ODM. We have multiple wearable manufacturing lines and have facilities in mainland China, with a daily output of 50K, which can meet the ordering needs of domestic and foreign customers. Sincerely welcome new and old customers to negotiate, thank you all Our store's prices do not include tax points, and additional tax points will be added when invoicing. Please consult customer service for more details Buyer Notice: Please read in detail, placing an order will be known by default 1. All products of our factory are not suitable for personal use. Please do not place orders or sample orders, do not provide after-sales service, and do not accept returns or exchanges. 2. Within 7 days without any reason for return or exchange, all products are fully inspected and shipped. Quality and functional issues are covered by warranty or replacement, and human and transportation damage is not guaranteed. Our factory does not bear the after-sales round-trip shipping costs. 3. Before placing an order, be sure to confirm the model, configuration, color, quantity, delivery time, etc. with customer service. Once shipped, the default configuration and other information are correct. 4. All measurement results of this device are calculated through scientific algorithms and are for reference only and do not have medical guidance significance. If you need accurate medical data, please purchase professional medical equipment.