Brand Name: Lenovo Style: In-ear Vocalism Principle: Dynamic Origin: CN(Origin) Active Noise-Cancellation: Yes Control Button: No Communication: Wireless Volume Control: Yes Certification: CE Number Of Drivers: 2 Plug Type: NONE Impedance Range: up to 32 Ω Model Number: LP40 pro Support Memory Card: No Waterproof: Yes Frequency Response Range: 20 - 20000Hz Magnet Type: Other Wireless Type: bluetooth Line Length: 0m Package List: User Manual,Charging case,Charging Cable,USB Type-C Adapter Driver Diameter: 13mm Resistance: 32Ω Sensitivity: 96dB Is wireless: Yes Connectors: Type c Earcups Type: Semi-open Bluetooth Version: 5.1 Total Harmonic Distortion: 5% Charging Method: Charging case Support APP: Yes With Microphone: Yes Features: waterproof,With Microphone,Active Noice Cancelling,Dual Connection