English description below Lightweight and Comfortable: Lightweight and ergonomic design offers you extra flexibility, portability and durability. 10-meter working distance gives you strong signal. Bluetooth wireless headphones, built-in microphone, call functions, Echo cancellation, foldable, HD voice, noise cancellation, sound isolation, playback controls, rechargeable. Cool Magnetic Attraction: Built-in magnets allow you to attach the two headphones together when not in use, and wear as a necklace around your neck, a convenient way to carry around when you don't need them. In-Line MIC & Volume Control: With in-line microphone and volume buttons, you can use the headphones for hands-free calls and manage music quickly and easily. Bluetooth V4.1: Advanced CSR 4.1 allows you to pair with all kinds of Bluetooth-enabled devices. Supports 2 connections simultaneously with faster pairing speed lower latency Lightweight and Comfortable: Lightweight and ergonomic design offers you extra flexibility, portability and durability. 10-meter working distance gives you strong signal. Bluetooth Wireless Headphones, Built-In Microphone, Call functions, Echo Cancellation, Foldable, HD Voice, Noise Cancellation, Noise Isolation, Playback Controls, Rechargeable. Cool Magnetic Attraction: Built-in magnets let you attach the two headphones together when not using, and wear like a necklace around your neck, a convenient way to carry around when you don't need them. In-Line MIC & Volume Control: With in-line microphone and volume buttons, the headphones enable you to make hands-free calls and manage music easily and instantly. Bluetooth V4.1: Advanced CSR 4.1 enables you to pair with all kinds of Bluetooth Enabled Devices. Supports 2 connections simultaneously with faster pairing speed lower latency