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UiiSii E1 TWS Bluetooth Earbuds Dual-Ear In-Ear Design for Sports Deep Bass Noise Cancellation and High-Quality Stereo Sound - Black

13mm dynamic driver delivers powerful bass, ergonomic in‑ear fit for all‑day comfort, IPX5 water resistance, touch controls for calls and tracks, and a charging case offering up to 25 hours of playtime.

UiiSii E1 TWS Bluetooth Earbuds Dual-Ear In-Ear Design for Sports Deep Bass Noise Cancellation and High-Quality Stereo Sound - Black
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  • Headphone-Accessories-UiiSii-E1-TWS-Bluetooth-Earbuds-Dual-Ear-In-Ear-Design-for-Sports-Deep-Bass-Noise-Cancellation-and-High-Quality-Stereo-Sound-Black-9
  • Headphone-Accessories-UiiSii-E1-TWS-Bluetooth-Earbuds-Dual-Ear-In-Ear-Design-for-Sports-Deep-Bass-Noise-Cancellation-and-High-Quality-Stereo-Sound-Black-1
  • Headphone-Accessories-UiiSii-E1-TWS-Bluetooth-Earbuds-Dual-Ear-In-Ear-Design-for-Sports-Deep-Bass-Noise-Cancellation-and-High-Quality-Stereo-Sound-Black-3
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Key Features

  • Sound Quality: 13mm small dynamic driver unit for faster and clearer signal transmission, delivering powerful bass that feels like you're right there

  • Wearing Comfort: In-ear design, ergonomically designed for all-day comfort without discomfort

  • Battery Life: Comes with a portable charging case, providing up to 25 hours of music playback with ample battery capacity

  • Water Resistance: IPX5 water resistance rating for comprehensive protection

  • Touch Controls: Sensitive touch controls allow you to answer calls, switch tracks, and more with a simple touch, ensuring a seamless user experience


Product Specifications

  • Bluetooth Version: 5.3

  • Speaker Diameter: 6mm

  • Frequency Range: 20–20,000Hz

  • Sensitivity: 100 ± 3dB

  • Impedance: 16Ω

  • Transmission Range: Approximately 10m

  • Single Earbud Weight: 4g

  • Total Weight: 43g  

  • Input: 5V 1A  

  • Playback Time: Approximately 25 hours  

  • Lithium-ion Polymer Battery 3.7V: Earbud 40mAh, Charging Case 400mAh  

  • Standby Time (including charging case): Approximately 300 hours  

Charging Time: Earbud approximately 1.5 hours, Charging Case approximately 2 hours

Troubleshooting: When only one TWS earbud connects

  • Check if the battery level is below 10%. If too low, charge immediately.
  • If earbuds fail to auto-pair, both red lights will flash rapidly. Quickly press the power button on both earbuds 5 times simultaneously. When red lights appear, reset is complete.
  • Place both earbuds into the charging case, then remove them. They will automatically pair successfully.



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  • Product Name:
    UiiSii E1 TWS Bluetooth Earbuds Dual-Ear In-Ear Design for Sports Deep Bass Noise Cancellation and High-Quality Stereo Sound - Black
  • Model Number:
    E1B
  • Warranty Period:
    1 Year

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