Brand Name: Lenovo 

Style: On-ear 

Certification: None 

Vocalism Principle: Dynamic 

Origin: CN(Origin) 

Control Button: Yes 

Active Noise-Cancellation: No 

Communication: True Wireless 

Volume Control: Yes 

Sensitivity: 108dB 

Wireless Type: Bluetooth 

Is wireless: Yes 

Max Output: 10mW 

Line Length: 0m 

Support APP: No 

Function: For Mobile Phone 

Function: Sport 

Number Of Drivers: 2 

Plug Type: None 

Package List: User Manual 

Package List: Charging case 

Package List: Charging Cable 

Impedance Range: up to 32 Ω 

Connectors: Type c 

Model Number: XT91 (used name : QT81 old) 

Earcups Type: Sealed 

Headphone Pads Material: SILICONE 

Bluetooth Version: 5.0 

Codecs: sbc 

Support Memory Card: No 

Driver Diameter: 8mm 

Resistance: 16Ω 

Waterproof: Yes 

Frequency Response Range: 20 - 20000Hz 

Total Harmonic Distortion: 1% 

With Microphone: Yes 

Features: waterproof 

Features: With Microphone 

Charging Method: Charging case 

Magnet Type: Other 

Bluetooth connection distance: 10M 

Battery capacity(case): 300mAh 

Music time: about 15hr with box (Single 3-5 hours) 

Led Light: Smart Battery display 

Type-c fast charge: about 1.5hr full charging 

Warranty: YES, 180 Days 

Others: 100% Original Lenovo and new 

wholesale or Dropshipping: Support 

compatibility: suit for iphone xiaomi huawei samsung htc smartphone 

compatibility 2: support lenovo motorola 

compatibility 3: suit for iOS Android Tablet