Metade na orelha sem fio TWS A2 transparente cristal mecânico baixa latência 5.3 fones de ouvido Bluetooth

2. Bluetooth protocol: HFP V1.5/AVRCP V1.5/A2DP V1.3 3. Working frequency: 2.402GHz -2.480GHz 4. Transmission power: Class2 3DB 5. Temperature range: -15 to+50 ℃ 6. Horn size and impedance: ⊙ 13mm real copper ring, 16 Ω 7. Audio signal-to-noise ratio S/N: ≥ 98dB 8. Mic sensitivity: -38Db ± 2Db 9. Microphone MIC: 2718 silicon microphone 10. Earphone battery: single-sided 40mAH, battery model 501012, polymer lithium battery without board 11. Charging case battery: 300mAH, battery model 602030, polymer lithium battery with protective plate 12. Headphone charging current/voltage: 30mA/DC 4.75-5.25V 13. Charging current/voltage of the charging case: 300mA/DC 4.75-5.25V 14. Headphone charging time: about 1 hour 15. Charging case charging time: about 2 hours 16. Transmission distance: ≥ 10 meters 17. Call time: about 5 hours 18. Listening time: about 5 hours (the actual usage time depends on the type and volume requirements of the song, with 80% volume) 19. Working current: 7mA 20. Leakage current after shutdown: 12uA 21. Call current: 8 mA 22. Volume playback current: 10 mA 23. standby time: about 70h (theoretical value. standby time when the earphones are connected to the phone and not working) 24. Charging port: TYPE-C 25. Charging case charges earphones ≥ 2 times Payment and delivery methods 1. Payment method: (1) 30% deposit in advance, final payment to be made after photo confirmation before shipment, and can be shipped after payment (Targeted customers); (2) Non customer, after payment, the company will arrange for shipment and provide a tracking number for timely inspection (For large quantities, payment can be made according to Method 1); (3) You can pick up the goods from our company and pay in cash. 2. The above is exclusive of taxes and special packaging. (Customers who need it can talk to us in advance.) 3. The above is delivery, excluding freight and tax 4. If you are not familiar with the product, please contact to send samples and confirm before placing an order. If the quality is not a problem, you can place an order. The quality is based on the samples (sample fees need to be paid for samples) Buyer Notice: 1、 Win win: After receiving the goods, the buyer checks and if there are any problems, please contact the seller's customer service in a timely manner. If you are not satisfied, you can raise them. Everyone is striving for a win-win situation, and we will try our best to satisfy you. If you give a positive or negative review without communication, we will consider it a malicious review and initiate a complaint, and cancel all after-sales services 2、 Our store defaults to normal, all of which are available. If the buyer is located in a more convenient location, they can contact customer service before placing an order. 3、 Repair: Products sent back for repair must use stickers Please indicate the cause of the defect and identify it as our factory's product. As the product cannot be controlled to 100%, individual defects will accumulate to a certain amount and be returned for replacement and repair together. The shipping fee will be paid by the buyer first (which will be cheaper), and the shipping fee will be replaced with the product when placing an order. If no further purchase is required, the shipping fee will be refunded to the buyer through a transfer. We do not accept any collect repair packages, and we do not need to send them back in case of individual issues. Such situations are not accepted. We hope you understand that we do not need to waste money on postage. 4、 Receiving: Before the buyer signs for the package, please open the package or express to check if the goods are damaged, missing, or have mismatched items; The risk of damage, shortage, or incorrect items shall be borne by the seller before the buyer signs for them; Delivery (after the buyer signs for it) shall be borne by the buyer, and the seller shall not be responsible for the above risks; If there is a situation where the buyer signs for the package first and then opens it for inspection, the buyer should request the staff to supervise and open the package for inspection on the spot; If any inconsistency is found, the seller should be contacted in a timely manner and detailed information should be added to the receipt, and the signature of the staff should be confirmed. 5、 The quantity displayed online is actually to express production capacity and demand. However, due to targeting a large customer base, there may be situations where the product is not in demand. When placing an order, you can first contact the seller and determine the delivery date. 6、 Delivery time: If there is stock in the normal warehouse at 17:00, it can be shipped on the same day. Products after 17:00 will be shipped the next day. If there is a shortage of quantity or products that need to be reproduced, the delivery time after communicating with you shall prevail. 7、 Shooting: All products are photographed in physical form. Due to lighting issues, the color may not be 100% close to the actual product. Please take photos with caution if you have particularly high color requirements. Alternatively, you can choose to take a sample first before placing an order.