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Features: True Wireless Stereo BT5.0: Wireless dual ear design, you can use the earbuds solely or in pairs. BT 5.0 enables high data transfer speed, stable connection, and low power consumption. Fast & Easy Paring: Auto power on and fast pairing between left and right earbuds once taking out from the charging case. Easy and quick to pair with BT-enabled audio devices. Long Battery Life: 40mAh battery in each earbud offers about 4 hours of music playing time. The earbuds can be charged automatically in the 1200mAh charging box. Hands-free with Dual Mic: Built-in dual Mic delivers clearer and more real talking sound in stereo mode. BT5.0 chip enables to grasp the detail of voice greatly. Battery Digital Display: LED battery digital display can clearly show the battery allowance of the earbuds and charging box. Charging box can work as a mobile power source to charge mobile devices. Smart Touch Control: Touch control design, no more pressure on your ears. Easy to control music, volume and call, and activate voice assistant. Specifications: Brand Name: Lenovo Model Number: QT81 BT Version: BT 5.0 Transmitting Distance: 10m/33ft (no obstacle) Drive Unit: 13mm Frequency Range: 20-20KHz Sensitivity: 100±3dB Impedance: 32Ω Charging Box Capacity: 3.7V 1200mAh Earphone Battery Capacity: 2 * 3.7V 40mAh Music Play Time: about 4 hours (depends on music volume) Waterproof: IPX4 Color: Black, White (Optional) Earbud Size: approx. 3.5*2.6*2.0cm/1.37*1.02*0.78in Earbud Weight (Each): 4g/0.14oz Charging Case Size: approx. 8.2*5.3*3.2cm/3.22*2.08*1.26in Charging Case Weight: 73g/2.57oz Package Size: 13.5*10.5*3.5cm/5.31*4.13*1.37in Package Weight: 130g/4.58oz
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