Brand Name: Huawei Style: In-ear Vocalism Principle: Dynamic Origin: Mainland China Active Noise-Cancellation: Yes Material: Plastic Control Button: Yes Communication: True Wireless Volume Control: No Category: Earphones & Headphones Certification: CE Number Of Drivers: 2 Impedance Range: up to 32 Ω Headphone Pads Material: Silicone Support Memory Card: No Waterproof: No Frequency Response Range: 20 - 20000 Magnet Type: Neodymium Wireless Type: bluetooth Package List: User Manual Package List: Charging case Package List: Charging Cable Package List: Replaceable Pads Set Is wireless: Yes Connectors: USB Earcups Type: Sealed Bluetooth Version: other Charging Method: Charging case Support APP: Yes Function: for Video Game Function: Common Headphone Function: For Mobile Phone Function: HiFi Headphone Function: Sport With Microphone: Yes Features: With Microphone Features: Active Noice Cancelling Version: Chinese Version Model: Huawei Freebuds 4i Feature: Active Noise Cancelling Sound: Pure Sound Quality Battery: 10 hours of continuous Playback Charge: Support Fast Charging