Brand Name: MILUDI Vocalism Principle: Orthodynamic Control Button: Yes Active Noise-Cancellation: Yes Communication: Wireless Volume Control: Yes Sensitivity: 120dB Wireless Type: Bluetooth Is wireless: Yes Function: For Internet Bar Function: for Video Game Function: Common Headphone Function: For Mobile Phone Function: Sport Plug Type: Line Type Package List: User Manual Package List: Charging Cable Impedance Range: up to 32 Ω Connectors: USB Model Number: i7s TWS Bluetooth Version: 5.0 Codecs: AAC Resistance: 35Ω Waterproof: Yes Frequency Response Range: 20 - 20000Hz With Microphone: Yes Features: Waterproof Bluetooth version: 5.0 Power level: CLASS 2 and Class 3 Output power: 30mW Frequency response: 2.4-2.85GHz Operating voltage range: 3.0V-5V Mic: -42dB (with microphone) Powerful noise de-noising circuit: (active noise reduction) Earphones battery: Polymer lithium battery 50mA Charging time: 1-2 hours Talk time: 2-3 hours Music time: 2-3 hours Standby time: 130 hours Transmission distance: Out door strainght distance of 10-15 meters Support wholesale: yes Support System 1: IOS Support System 2: Android Support System 3: Windows Color: Black,White,Red,Pink,Gold