SPECIFICATIONS

Brand Name: Lenovo
Style: Headphone
Vocalism Principle: Dynamic
Origin: Mainland China
Active Noise-Cancellation: No
Material: Plastic
Control Button: Yes
Communication: WireLess
Volume Control: Yes
Category: Earphones & Headphones
Number Of Drivers: 2
Plug Type: none
Impedance Range: up to 32 Ω
Headphone Pads Material: Other
Sound Isolating: YES
Support Memory Card: No
Waterproof: No
Frequency Response Range: 20 - 20000
Magnet Type: Other
Voice assistant built-in: No
Wireless Type: bluetooth
Package List: User Manual
Package List: Charging Cable
Driver Diameter: 40
Resistance: 32
Sensitivity: 96
Is wireless: Yes
Connectors: Type c
Earcups Type: Semi-open
Bluetooth Version: 5.0
Total Harmonic Distortion: 1
Charging Method: cable
Max Output: 10
Support APP: No
Function: for Video Game
Function: Common Headphone
Function: For Mobile Phone
Function: HiFi Headphone
With Microphone: Yes
Features: waterproof
Features: With Microphone
Features: Active Noice Cancelling
Choice: yes

Lenovo TH40 Stereo Wireless Bluetooth Earphones Sports Headphones
More FAQ.Please check it at the end.
Works perfectly and the sound is awesome!  Funcionan excellent, 100% original  The bass is good.

Good looking!  Long battery life  HIFI sound quality!
TH40 Hybrid Active Noise Reduction Headset
ANC Noise reduction technology  
40mm moving-coil unit  
50 hours long battery life  
45ms low latency  
kinesiology  
Egg white ear muffs  
Convenient storage  
Wired/wireless
One-button silencing on commuting
Coffee house jing xiang music  
Enjoy studying